this one works great-
http://www.grisoft.com/us/us_dwnl_free.php

will this one expire in like 3 months and make me pay for it?

what about the one from the housecall website? www.trendmicro.com

Grisoft.com has no time limiton it's AVG anti virus software. I found it works quite well. You can program it to automatically update and scan your sytem. You can pay to upgrade to additional features. They seem to have quick response to new threats.

You may also want pop up stopper from panicware.com . Its free (for the basic version).
Good luck.

PS try pcpitstop.com for good on line diagnostics.

ok thanks, i have google pop up blocker though and it works very very good

hi.joe.a good free antivirus would be avg.but if you want to tryout the best antivirus going bar none its nod32 you can download a trial fromhttp://www.nod32.com/download/trial.htm.

No, probably not. I have been using the free version of AVG for well over a year now. I wish I could afford to pay for it. I like it a lot.

That's an on-line on-demand tool only and doesn't work in the background.