Uninstall OSS -following on from my other post

MudCrab has been helping me but I imagine hes in adifferent time zone to me (I'm UK now 13:30), and my problem is now in need of an urgent fix.
I just want OSS 11 off my PC and to regain control of it.
How do I remove OSS via the command prompt, as thats is the only way I can get any sort of access to the Pc).

Cant get into safe mode, tried a recovery disk that I was told should be able to sort it out, but OSS seems to overide eveything !

The command prompt is by way of the Win 7 disk recovery console.

If anybody can help me I will me very grateful

Thanks