Downloaded virus codec from two girls one cup video, how do i remove?

Ok Everyone at school says "Man you gotta watch this video its sick!" so im like ok. But when i try to watch it (First mistake) it asks me to download a codec and i clicked cancel and moved on. Then i saw another link and it asked same thing so i downloaded it (for whatever reason) and i just found out that: Yay i downloaded a virus... How can i remove it. Whenever i try to open an application it says:

Your browser was hijacked by Trojan.Win32.Agent.akk

You need to clean your system immediately, in other casr it can be crashed soon!

Click OK to download the high-tech antispyware protection software!(Recommended)

I click no everytime because i think its gonna make it wors because of "high-tech" doesnt sound like something windows would say. I used a scanner and found Trojan.Vundo file and it said it may have secretly installed itself downloading a plugin or codec but i cant remove it without buy ing full version! Any ideas??!!

Downloaded virus codec from two girls one cup video, how do i remove?download

I don' know what you are doing watching that sick video... but you obviously are infected and not just with a single thing from the looks of it.

Vundo and the Trojan you've mentioned appear to be two separate infections and you would do well to invest in a proper security suite (antivirus, firewall, antispyware, etc) from a RELIABLE vendor (mcafee, norton, kaspersky, etc) that can properly protect you (from yourself).