NOD32, "Winifixer" and my hijacked desktop??

About two hours ago (while surfing), I picked up something bad. NOD32 is giving me a virus warning and blocking access to a "winifixer.com" site. My desktop has lost its background and gone to blue with the following msg in the middle of it "Warning. Spyware detected on your computer. Install an antivirus or spyware remover to clean your computer" (I think my invader is putting this msg up). Also, a new program mysteriously appeared: AntivirXP08. I tried to unintall it from control panel, but it didn't, so I manually deleted the program (only a couple of megs). Worse: my desktop controls only partially function: there's no option to set background or screen saver any longer. Ran ad-adware and removed a load of malware which I think only appeared in the last little while.

Finally, tried system restore from the only auto-point I have available, but it didn't do anything (i.e., no change after restore). What's going on here? Am I truly screwed? I've never seen anything that NOD32 couldn't stop. What I really need to do is restore back 24 hours, but restore doesn't seem to want to let me do this.

Explorer and my internet connection seem to be ok (but who knows what's going on under the hood).

Thanks for any help.

 

See:
https://www.wilderssecurity.com/showthread.php?t=216294

 

Thanks for the link. Using the info in that thread, I got rid of the infection and got my screensaver and background tabs back by using a registry tweak.