I am now going to try and install Nvidia and Creative drivers anew in an attempt to get rid of their respective errormessages. No idea what to do about the svchost error yet.
Edit: Oh great, winamp won't play anymore, it can't find my soundcard (hmmm, maybe that one's a creative too). Unfortunately I can't check it since I can't get into the windows configuration screen. So whatever it is, it seriously messed up my dll's and registries. Reinstalling Nvidia drivers proved useless too: the install prog can't find 'compatible software' to update.