In which order are startup programs loaded?











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Are Windows 10 startup programs initiated in a specific sequence, such as alphabetical or CPU impact order, or are they all initiated simultaneously?



Are there special cases in which programs are given preference from others, such as Windows Defender loading first for security purposes?










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  • The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
    – Akina
    Dec 7 at 6:55












  • Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
    – Seth
    Dec 7 at 7:22















up vote
2
down vote

favorite












Are Windows 10 startup programs initiated in a specific sequence, such as alphabetical or CPU impact order, or are they all initiated simultaneously?



Are there special cases in which programs are given preference from others, such as Windows Defender loading first for security purposes?










share|improve this question






















  • The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
    – Akina
    Dec 7 at 6:55












  • Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
    – Seth
    Dec 7 at 7:22













up vote
2
down vote

favorite









up vote
2
down vote

favorite











Are Windows 10 startup programs initiated in a specific sequence, such as alphabetical or CPU impact order, or are they all initiated simultaneously?



Are there special cases in which programs are given preference from others, such as Windows Defender loading first for security purposes?










share|improve this question













Are Windows 10 startup programs initiated in a specific sequence, such as alphabetical or CPU impact order, or are they all initiated simultaneously?



Are there special cases in which programs are given preference from others, such as Windows Defender loading first for security purposes?







windows-10 boot






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asked Dec 7 at 5:40









enriquejr99

132




132












  • The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
    – Akina
    Dec 7 at 6:55












  • Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
    – Seth
    Dec 7 at 7:22


















  • The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
    – Akina
    Dec 7 at 6:55












  • Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
    – Seth
    Dec 7 at 7:22
















The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
– Akina
Dec 7 at 6:55






The order is unspecified (except defined by dependence - for example, none programs can start from HKCU/Soft/MS/Win/CurVer/Run or from Autostart menu folder until explorer.exe is started). And no preferences.
– Akina
Dec 7 at 6:55














Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
– Seth
Dec 7 at 7:22




Security software often includes system drivers which are loaded before regular applications. It's a broad field so you likely would need to be more specific. What's the order of Windows startup on StackOverflow might be interesting. The part about the logon phase especially.
– Seth
Dec 7 at 7:22










1 Answer
1






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Windows launches on startup the programs in parallel, but in groups, as follows:




  • Windows Boot Device Drivers, having a Start value equal to 0
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows Auto-start Services & Drivers, having a Start value equal to 2
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows delayed Auto-start Services & Drivers, having a Start value equal to 2
    and DelayedAutostart equal to 1:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Run Services Once only:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServicesOnce
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServicesOnce


  • Run Services permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServices



After the user logs on, the order is as follows :




  • Notify of the logon event:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonNotify


  • User Initialization:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonUserinit


  • Shell:
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogonShell
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonShell


  • ShellServiceObjectDelayLoad pointing to CLSID InProcServer:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionShellServiceObjectDelayLoad


  • RunOnce Local Machine Key:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnceEx


  • Run permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun


  • RunOnce Current User Key (mostly for installations):
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce


  • Explorer Run:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun


  • Load Key (deprecated):
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindowsload
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows


  • SharedTaskScheduler:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerSharedTaskScheduler


  • AppInit_DLLs:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows



  • All Users Startup Folder:



    C:UsersAll UsersStart MenuProgramsStartup



  • User Profile Startup Folder :



    C:UsersusernameStart MenuProgramsStartup



Sources :




  • Windows Registry Persistence, Part 2: The Run Keys and Search-Order


  • Windows Program Automatic Startup Locations.






share|improve this answer





















  • Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
    – Keltari
    Dec 7 at 16:39













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up vote
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Windows launches on startup the programs in parallel, but in groups, as follows:




  • Windows Boot Device Drivers, having a Start value equal to 0
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows Auto-start Services & Drivers, having a Start value equal to 2
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows delayed Auto-start Services & Drivers, having a Start value equal to 2
    and DelayedAutostart equal to 1:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Run Services Once only:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServicesOnce
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServicesOnce


  • Run Services permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServices



After the user logs on, the order is as follows :




  • Notify of the logon event:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonNotify


  • User Initialization:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonUserinit


  • Shell:
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogonShell
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonShell


  • ShellServiceObjectDelayLoad pointing to CLSID InProcServer:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionShellServiceObjectDelayLoad


  • RunOnce Local Machine Key:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnceEx


  • Run permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun


  • RunOnce Current User Key (mostly for installations):
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce


  • Explorer Run:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun


  • Load Key (deprecated):
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindowsload
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows


  • SharedTaskScheduler:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerSharedTaskScheduler


  • AppInit_DLLs:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows



  • All Users Startup Folder:



    C:UsersAll UsersStart MenuProgramsStartup



  • User Profile Startup Folder :



    C:UsersusernameStart MenuProgramsStartup



Sources :




  • Windows Registry Persistence, Part 2: The Run Keys and Search-Order


  • Windows Program Automatic Startup Locations.






share|improve this answer





















  • Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
    – Keltari
    Dec 7 at 16:39

















up vote
1
down vote



accepted










Windows launches on startup the programs in parallel, but in groups, as follows:




  • Windows Boot Device Drivers, having a Start value equal to 0
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows Auto-start Services & Drivers, having a Start value equal to 2
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows delayed Auto-start Services & Drivers, having a Start value equal to 2
    and DelayedAutostart equal to 1:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Run Services Once only:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServicesOnce
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServicesOnce


  • Run Services permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServices



After the user logs on, the order is as follows :




  • Notify of the logon event:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonNotify


  • User Initialization:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonUserinit


  • Shell:
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogonShell
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonShell


  • ShellServiceObjectDelayLoad pointing to CLSID InProcServer:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionShellServiceObjectDelayLoad


  • RunOnce Local Machine Key:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnceEx


  • Run permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun


  • RunOnce Current User Key (mostly for installations):
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce


  • Explorer Run:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun


  • Load Key (deprecated):
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindowsload
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows


  • SharedTaskScheduler:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerSharedTaskScheduler


  • AppInit_DLLs:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows



  • All Users Startup Folder:



    C:UsersAll UsersStart MenuProgramsStartup



  • User Profile Startup Folder :



    C:UsersusernameStart MenuProgramsStartup



Sources :




  • Windows Registry Persistence, Part 2: The Run Keys and Search-Order


  • Windows Program Automatic Startup Locations.






share|improve this answer





















  • Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
    – Keltari
    Dec 7 at 16:39















up vote
1
down vote



accepted







up vote
1
down vote



accepted






Windows launches on startup the programs in parallel, but in groups, as follows:




  • Windows Boot Device Drivers, having a Start value equal to 0
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows Auto-start Services & Drivers, having a Start value equal to 2
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows delayed Auto-start Services & Drivers, having a Start value equal to 2
    and DelayedAutostart equal to 1:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Run Services Once only:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServicesOnce
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServicesOnce


  • Run Services permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServices



After the user logs on, the order is as follows :




  • Notify of the logon event:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonNotify


  • User Initialization:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonUserinit


  • Shell:
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogonShell
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonShell


  • ShellServiceObjectDelayLoad pointing to CLSID InProcServer:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionShellServiceObjectDelayLoad


  • RunOnce Local Machine Key:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnceEx


  • Run permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun


  • RunOnce Current User Key (mostly for installations):
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce


  • Explorer Run:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun


  • Load Key (deprecated):
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindowsload
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows


  • SharedTaskScheduler:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerSharedTaskScheduler


  • AppInit_DLLs:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows



  • All Users Startup Folder:



    C:UsersAll UsersStart MenuProgramsStartup



  • User Profile Startup Folder :



    C:UsersusernameStart MenuProgramsStartup



Sources :




  • Windows Registry Persistence, Part 2: The Run Keys and Search-Order


  • Windows Program Automatic Startup Locations.






share|improve this answer












Windows launches on startup the programs in parallel, but in groups, as follows:




  • Windows Boot Device Drivers, having a Start value equal to 0
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows Auto-start Services & Drivers, having a Start value equal to 2
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Windows delayed Auto-start Services & Drivers, having a Start value equal to 2
    and DelayedAutostart equal to 1:
    HKEY_LOCAL_MACHINESystemCurrentControlSetServices


  • Run Services Once only:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServicesOnce
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServicesOnce


  • Run Services permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunServices
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunServices



After the user logs on, the order is as follows :




  • Notify of the logon event:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonNotify


  • User Initialization:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonUserinit


  • Shell:
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogonShell
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWinlogonShell


  • ShellServiceObjectDelayLoad pointing to CLSID InProcServer:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionShellServiceObjectDelayLoad


  • RunOnce Local Machine Key:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnceEx


  • Run permanently:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun


  • RunOnce Current User Key (mostly for installations):
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce


  • Explorer Run:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun
    HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorerRun


  • Load Key (deprecated):
    HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindowsload
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows


  • SharedTaskScheduler:
    HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerSharedTaskScheduler


  • AppInit_DLLs:
    HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionWindows



  • All Users Startup Folder:



    C:UsersAll UsersStart MenuProgramsStartup



  • User Profile Startup Folder :



    C:UsersusernameStart MenuProgramsStartup



Sources :




  • Windows Registry Persistence, Part 2: The Run Keys and Search-Order


  • Windows Program Automatic Startup Locations.







share|improve this answer












share|improve this answer



share|improve this answer










answered Dec 7 at 14:16









harrymc

251k11259559




251k11259559












  • Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
    – Keltari
    Dec 7 at 16:39




















  • Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
    – Keltari
    Dec 7 at 16:39


















Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
– Keltari
Dec 7 at 16:39






Good answer. I also want to note that some services can have a delayed start to ensure other services start first (hopefully), or to lessen startup time impact. With so many services and applications starting, there completion times can vary heavily under load. And to address the OPs question, Windows Defender is a service, the application seen in the task tray loads later.
– Keltari
Dec 7 at 16:39




















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