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.