We have the fix:
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Trev Broughton>REGSVR32 /U mscomctl.ocx
C:\Users\Trev Broughton>REGSVR32 mscomctl.ocx
C:\Users\Trev Broughton>
Basicly run those two commands as above, and then was fine. Both Stock and PCTill and stock as well as Vonage Click2Call now work, so I am happy.
Any q's PM me but basically, I googled it and found people have this issue with masses of apps on Vista, as far as I can make out MS do not seem to acknowledge the existence of the issue and reinstalling VB common doesn't make a blind bit of difference.