Microcode Update Driver Service Defaults in Windows XP

Update Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:Microcode Update Driver
Service name:Update
Service type:kernel
Error control:normal
Path:%SystemRoot%\system32\DRIVERS\update.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Update

Default Behavior

Microcode Update Driver is a kernel device driver. In Windows XP it won't start until the current user starts it. If the Microcode Update Driver fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the Update service has failed to start.

Restore Default Startup Configuration for Microcode Update Driver

1. Select your Windows XP edition and service pack, and then click Download.

2. Save the WinXP_Update_Service_Startup.cmd file to a local storage device.

3. Run the saved file.

4. Restart the computer.

The Update service is using the update.sys file that is located in the %WinDir%\system32\DRIVERS folder. If the file is changed, damaged or deleted, you can restore its original version from Windows XP installation media.