This works on XP so...............maybe?

Try this but back up the Registry first or at least save the keys that will be changed/deleted!


This message is placed on the desktop when some of the betas of service
pack 1 were installed.
Generally it was accepted that people should restore back to the point prior
to applying the beta before they applied the next beta or final service
pack.
The text can be removed manually if you wish.

Open regedit and go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates
and delete the folder under it:
2BD63D28D7BCD0E251195AEB519243C13142EBC3

Then go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates
and delete the folder under it:
FEE449EE0E3965A5246F000E87FDE2A065FD89D4