I havea really serious problem with my computer!

When it starts up,and after i have logged in, there is a window that says

Common CLient User Session has ended..

After that, if I try to use the internet, the site just comes up with Page Cannot Be Displayed or Search page not found! I have properly connected everything!

Please help me with your expertise! I suspect it is a Trojan. I have tried scanning it with AntiSpyware and Spyware Doctor.

Please help

Read my signature, run the appropriate program (Spybot and Ad-aware) and then post a Hijack This log to the forum.

I have already tried scanning the computer with Spybot and Ad-aware. So far it has only come up with tracking cookies and i have deleted them. I cant downlaod Hijack This because by Internet is stuffed. Ill downloadit tommorow and send you the details