Unsigned Drivers - Use Sigverif.exe
Published: April 22, 2002
Submitted by Kelly Theriot, Windows XP MVP, Gray, Louisiana
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When you receive error messages and are troubleshooting, use Sigverif.exe to check for unsigned drivers on your system.
1. | Click Start, click Run, type sigverif, and then click OK. |
2. | Click Advanced, click Look for other files that are not digitally signed, navigate to the Winnt\System32\Drivers folder, and then click OK. |
3. | Click Start. |
After Sigverif.exe is finished running its check, a list of all unsigned drivers installed on your computer is displayed. The list of all signed and unsigned drivers found by Sigverif.exe can be found in the Sigverif.txt file in the %Windir% folder, typically the Winnt or Windows folder. All unsigned drivers are noted as Unsigned.
When you determine what drivers are unsigned, create a folder in which to place the unsigned drivers. Typically, SysDriversBak is an easy folder name to remember.
Restart your computer without the unsigned drivers in the Winnt\System32\Drivers folder and test your program or other functionality to see if the error messages or issues occur.
Open Help and Support and type file signature verification in the Search box for more information on the File Signature Verification Tool.
