It sounds like you are a newbie ........... I know I'm too late but DON"T PANIC
You just have a horrible pesky "adware" thing that is now deep inside your computer.
You will never get rid of it .... unless you erase everything you have ever done and have on all hard drives,.
But you can Isolate it
Don't Panic
Do not start deleting anything. Especially do
not delete or change your Regisry
Leave your computer alone.
Go away and take some deep breaths.
Yes , your computer is not really yours anymore
Use first anti viurs
http://www.grisoft.com/doc/1
then anti spy
..lavasofft adaware
then anti adverts .....then spybots
just be careful !
oh an enjoy ...lol
if you found this site and got this far then you know what you should do.
I know it can be scary but calmly you will beat it
(old I know but for newbies ... maybe some help)
Microsoft has a good downloadable thingie as does "shield up" Google
finally when you are spam free , go and get Firefox as a browser... much much safer
hope your fine soon,
,,mark