>What is "cybersquatting"? I think, they are trying to mislead. I downloaded that software, ran it. It found several infected files: one trojan and few suspected spyware. But all options to cure led to their site asking for credit card information. So I just deleted that file myself and run Lavasoft (forgot the name right now). It showed this program as spyware and didn't show anything that program found. I did it today at 5 am (just woke up early), so I didn't really investigate, what's going on with my computer.
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>But yesterday Opera browser refused to work and I had to un-install it. I'm now thinking which browser to use at home. I liked Opera's interface. Is FireFox similar? If yes, what is the link for it?

See http://www.pcwebopedia.com/TERM/c/cybersquatting.html

However, selling the domain to its rightful owner may not be the only reason to get a domain that logically should belong to someone else. In this case, it seems they want to trick you into getting their software instead of the legitimate AVG software.

I tried FireFox, and don't like it as much as Opera. It does seem to be better than Internet Explorer, though. Also, I keep FireFox for compatibility - some sites may not work with Opera (specifically, GMail doesn't work yet with Opera).

Just search Google for FireFox; you should find it quickly.