Were you using AVG before you had the popup infestation?
First off, I recommend ditching AVG, and buying an anti-virus program.
(Check PC Magazine, or your favorite computer publication to figure
out what to buy.)
Secondly, in all the browsers currently installed on your computer,
delete cookies, and if there is an option to delete all personal
information, use it.
To prevent pop-ups in the future, use a browser that has a built-in
popup blocker (per the suggestion of whomever it was -- Google Chrome,
Mozilla Firefox, Internet Explorer with Google Toolbar installed)

But I think the major source of the popups is AVG itself.

Just my $.02.
cheers,
sudhir

On Fri, Jan 9, 2009 at 10:57 AM, Joy Hecht <hecht.joy@gmail.com> wrote:
> I'm suddenly getting popups on my computer - never had them before - and I
> was wondering if someone can recommend good freeware to deal with them.
>
> I am running AVG Anti-virus free version, I update regularly and scan every
> day.  Yesterday in the middle of working (not scanning) AVG suddenly opened
> a window to tell me I had a trojan.  Windows started opening right and left,
> all kinds of things happening.  I shut all my files, disconnected from the
> internet, and scanned.  AVG found 11 infected files and cleaned them.  I
> rescanned again, and found no infections.  Today I scanned and found
> nothing, updated the database of virus info as usual, all looked fine.
>
> But I'm getting popups - not a lot, but a few.  I got one today from
> something called "registry defender for windows" which kind of mimicked AVG
> anti-virus, so I went to their website.  But then a few more popups opened,
> so I figured they were bogus and shut them down.
>
> Can anyone recommend a good way to stop the popups or figure out what's
> allowing them onto my computer?
>
> Thanks!
>
>
>
> Joy
>