Identify the source of WinXP unsigned files

In Windows XP, there are a lot of software (or drivers) that are not "signed" (ie Microsoft's "digital signature"). Some software does not have a "signature" that will not affect the normal operation of the system, but some will not work, often causing some unknown errors. Today I will teach you how to check whether the file is a "signature" method, in order to facilitate the system to determine which program caused the problem in the event of an error.

Query which files are signed and do not need to use third-party software, you can use the verification tool "Sigverif" that comes with Windows XP.

Click "Start" → "Run", enter "sigverif" in the dialog box that opens, and click "OK" button to pop up "File Signature Verification".

You can click the "Start" button to query, but doing so will make the query time longer. We can specify the scope of the query to shorten the query time. Click the "Advanced" button, the "Advanced File Signature Verification Settings" dialog box will pop up, click "Find other files that are not digitally signed" in this dialog box, and then select the file you want to scan in "Scan this file type". After the file suffix type is set, click the “OK” button and the program will return to the interface.

Small Tips:

When setting in the interface, you can set the file range in the C:\\Windows\\System32\\Drivers directory, which is better. Reduce the query time.

After returning to the interface, click the "Start" button and the program will enter the query state. Wait a moment, the system gives the results of the query.

In the query results given by the system, you will find that all signed and unsigned driver lists are in the Sigverif.txt file located in the %Windir% folder (usually Winnt or Windows). And all unsigned drivers are marked as "Unsigned". After you have determined which files are not signed, you can back them up to other places, and then delete the files in the original directory. Once the system prompts an exception, you can restore it back.