Verifying the digital signature of a file in Windows 10 system can be carried out according to the following steps:

Step 1: Open the folder and find the file whose digital signature needs to be verified.

Step 2: Right-click the file and select Properties.

Step 3: In the file properties window, switch to the Digital Signature tab.

Step 4: In the Digital Signature tab, you can see the digital signature information of this file. Please ensure that the signer's name and certificate are the same as those of the signer you trust.

Step 5: If the signature information is displayed as "The file has no digital signature or the digital signature is invalid", it means that the file has not passed the digital signature verification, and there may be risks.

Step 6: If the signature information is displayed as "This digital signature was signed by the selected signer", it means that the file has passed the digital signature verification with high reliability.

By checking the digital signature information in the file properties, we can quickly understand and verify the validity of the file signature and ensure the security of the file.