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The Driver Verifier Manager is a tool created by Microsoft to diagnostic installed drivers, and is used by Windows Hardware Quality Labs (WHQL). The tool tests how drivers handles certain "extreme" situations with limited resources (Ex. low memory) or failing function calls.

The tool is mainly for driver developers to help them test their own driver before it is actually released. It is possible for the average user to use this tool, but one should make sure to have created a backup of important documents first before doing this. This precaution is necessary because ex. stress testing the disk-drivers can lead to data-loss.

• Before starting make sure to make a backup of the system registry, so one can rollback the system if the driver verifier makes a driver fails so the system is unable to boot properly:
  • Win2k+ - Emergency Recovery Disk
  • WinXP+ - Automatic System Recovery
  • Ntbackup to backup System State and use Recovery Console to restore the registry
  • Regback to backup registry files and use Recovery Console to restore the registry
• Start the Driver Verifier Manager with this command:

  Verifier.exe

• Configure what drivers to verify (Don't verify all drivers as it will become painfully slow):
  • Win2k: Select Settings-tab to configure what drivers to verify
  • WinXP: Select Create standard settings to choose what type of drivers to verify
• Reboot and if any problems a Blue Screen Of Death (BSOD) will appear showing the problem driver
  • Don't perform a logon within the first 30 minutes (Disable Automatic Login), or else one will loose the ability to rollback easily using Last Known Good Configuration
• Turnoff the Driver Verifier with this command:

  Verifier.exe /reset

More Info MS KB Q244617
More Info MS KB Q251233
More Info MS KB Q325672 (Careful with Norton Antivirus)
More Info Windows Hardware and Driver Central: Driver Verifier

Credits OneComputerGuy.com