OK I am in serious trouble here. WB5 was working excellently but I hadnt installed new graphics cards in about 3 months. I just installed the new nvidia drivers for my 6800 GT. Post reboot- major problems: I get 2 svc host errors after logon. If I say OK to the first- the PC just freezes up completely. If I say cancel, then it runs OK-ish but had to uninstall WB5 and it has also screwed up my soundcard and network drivers.
This does not seem to be an nvidia driver problem- it is more tied to the interaction between the new drivers and WB5 as WB5 looks all corrupted.
At the moment it looks like the only solution is going to be wiping my c drive and reinstalling windows... not an ideal solution by ANY means!