If so, would you recommend and free ones?

What is the best and free registry cleaner? And where can I download it?
Many thanks x

Ok, so here is my problem. I was on myspace looking at a music artists’ photos, when all of a sudden, my anti virus program (Avast) pops up and tells me a whole bunch of viruses are invading my computer. After this occurrence, my internet has been really messed up.

So over the past 5 days or so, I have been virus scanning my entire computer about 10 times, and my anti virus cannot find any more viruses. I have also done anti-spyware scans and I have eliminated a bunch of spyware, too.

When I say my internet has been really messed up, I mean this: My anti virus’ script blocker and all of the other blockers are on their highest settings along with Firefox’s pop-up blocker, and I still get pop-ups, something I have almost never gotten before.

Besides this, when I try to visit websites, my Firefox error console gets riddled with error messages telling me it doesn’t recognize or can’t read a certain part of a website and it says "Declaration dropped."

Also, when I tried to install a registry clean up software, I got a message saying it wasn’t a valid Win32 application or something of that sort. I eventually got one installed, but my internet hasn’t shown any signs of improving.

By the way, when I typed in Firefox’s website to try to re-install it, the website wouldn’t load. It just wouldn’t. Also, Google Chrome and Internet Explorer aren’t any faster.

My computer can still play video games and do almost everything else that doesn’t include the internet just fine, but my internet is just so messed up.

Can someone please help me? My computer internet has never acted this way.

Thank you!!!!!!!!

It’s true that registry cleaners for Windows (any version) are bad and do more damage to the OS than really cleaning the registry?

I’ve tried everything, and they all say that i need to pay money, and that they can only repair 20 items. My computer is running slower than ever now that i have so many errors on it. I have AVG anti virus and AVG anti spyware, so i know i don’t have any viruses or anything like that. I did have a Trojan Horse virus but i wiped it with AVG. But i think it may have caused plenty errors on my PC, plus a lot of other things that i’ve unknowingly did. Can somebody please help me get my PC up and running good. THANKS