really bad virus....i need advice

[scarletboa]

while using the google search engine, somehow, a "antivirus trial" automatically started doing a "scan" on my computer and "found" about 50 viruses.

now, whenever i try do do ANYTHING, it says for example: "application cannot be executed. the file taskmgr.exe is infected. do you want to activate your antivirus software now?" it said that when i tried to open up task manager. on top of that, it keeps opening up internet explorer (i normally use google chrome) and automatically goes to porno.org, porno.com, adult.com, and viagra.com. it has about 50 tabs of that open right now. it also keeps saying "infiltration alert, your computer is being attacked by a virus, do you want to block this attack?" i unplugged my internet adapter as soon as it started acting up.

also, a new little red security sheild thing in the task bar on the right with the x keeps popping up at a rate of about 2 per second.


the only thing the computer will let me do is go to the "antivirus" website and buy their product. i can't even turn the pc off without holding the power button down.

i noticed that when i restart the computer, the "antivirus" program is one of the last things to open, so i quickly started a real virus scan with avira antivir before the "antivirus" could start. even though i had to keep clicking resume scan every 5 minutes, it finished the scan and found nothing.

i am using my laptop right now and my desktop is the one that is infected

HELP!!