To turn on or off the Digital Signatures
icon display in Windows Explorer
In Windows Explorer, locate a file that has a digital signature
icon.
Right-click the file name. Click Enable/Disable Digital
Signature Icons.
Click the check box next to Validate Digital Signatures and
Display Special Icons to turn on the icon display in Windows
Explorer, or clear the check box to turn off the icon display.
Click OK. Log out of Windows, and then log back in.