I have a virus, help!?

It is a pop-up, that says I have a trojan and to download some antivirus program. It specifically states:

Your computer was infected by an unknown trojan.

It's dangerous for your system (critical files can be lost)!

Click OK to download the antispyware program to clean your system! (Recommended)

I ran Norton AntiVirus, and it didn't pick anything up

When I click OK, it takes me to this site:

http://89.149.227.195/setup2.exe

I haven't downloaded this thing from clicking OK.

The virus hi-jacked IE with porn whenever I search with google, so I'm using FF.

Please help!

I have a virus, help!?nortan antivirus

http://free.grisoft.com/

delete norton its not good for nothing.

Thats AVG a good free anti virus.

also download this google pack they will help you protect yourself better.

http://pack.google.com/intl/en/pack_inst...

I have a virus, help!?nortonantivirus

Don't click on anything in the pop-up, it will just install more rubbish.

SuperAntiSpyware is good for this type of infection.

http://www.superantispyware.com/

In the program you can also lock your Homepage so it stays at what you want.
It's bogus and should be ignored.