And in future I would suggest you use
FIREFOX
Also,
DO NOT RUN AS ADMINISTRATOR! Make your day-to-day user account a restricted user, then use the admin account when you need to install software. Spyware can't install if it doesn't have admin rights. This is been the premise of security on all good (ie. NOT windows) operating systems for about 40 years.
Restoring to factory settings is "cure by obliteration", and only a very very last resort plan of action. Your best bet is to keep a separate drive for big files (music, movies etc..), then image your system partition periodically (usually C: drive) using Ghost, DriveImage etc whilst it's in a good, clean state... Then it can be restored in minutes to its previous good state if you ever find yourself up shiat creek.