Were you hit by NOD32's false detections like me? One of NOD32's Aug 30 updates falsely detected urlmon.dll as a virus. I made NOD32 delete the it and after a restart, my IM's, IE, System Restore, and installers stopped working. I tried the solutions posted at :
But I had no success. I had to do a repair via Win XP CD to have my system up.
Just one file and it resulted to such disaster.