How do you kill an application when all you have is the GUID?

It's a VPN client and the shortcut references a GUID/registry key/CLSID
{c3a78f90-b4a7-12cd-b979-080a2b30b5eb} I've tried to find an application reference with regedit without success.
How do you kill it when all you have is the GUID/registry key/CLSID?
[276 byte] By [lagu2653] at [2007-11-20 11:34:06]