Ok, first things first.
Go to
http://www.lavasoftusa.com and download Ad-Aware Personal Edition. Download it to the desktop and install it.
Go to
http://www.safer-networking.org/en/index.html and download Spybot Search and Destroy. Save it to the desktop and install it.
Download HiJack this from
http://www.spychecker.com/program/hijackthis.html and install it.
Go to the start menu, click "Run" and type "Msconfig" and hit enter. Go to selective startup and uncheck and various programs that are not needed, ie. RealPlayer, Quicktime, and any suspicious viruses.
Restart your computer and run in safe mode. Run your anti-virus software and then delete any viruses. Restart again into normal mode and then run Ad-Aware and Spybot, being sure to update them each. Restart again.
Run Hi-Jack this and delete any suspicious files that you do not recognize as Windows files.
Now, go to
http://www.mozilla.org and download Firefox. Firefox is a different browser than IE with NO spyware, NO adware, and NO viruses.