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