My OS has gotten infected and I can't even find Windows IE. I can get on with Netscape but there are all kinds of popups and the mouse does not work half the time. I was able to download and run Avast and also Spy Bot S & D and got rid of some viruses. I stopped Avast when it got to the Windows files as I didn't know about deleting those files. Should I run Avast again and delete bad files or move them to the chest or do a system restore? Thanks for your help.