AVG may not be completely removed from your computer, Here are two websites; the first is how to remove it tutorial and the second is a removal tool that will expunge it from you system:http://www.mytechguide.org/7871/how-to- ... antivirus/http://www.avg.com/us-en/utilities
Get rid of any tool bars associated with AVG or any other toolbar for that matter...ya don't need the spyware anyway. That is what tool bars are for to track your searches on the interwebs...ya got enough stuff tracking you as it is, don't invite more. When I work on friends/relatives systems, tool bars are uninstalled with a reprimand following said action.
Is windows fully updated via Microsoft Updates?
Try Firefox, I have had good luck with it down through many years.