A friend fixed my Dell vista computer by cleaning it up with avast free edition and cccleaner.Previously it had lost the windows firewall and defender to some virus or whatever.After removing hundreds of viruses it still has no Windows firewall or defender.Can I download a free firewall and use that safely even though my Windows firewall and defender have been compromised?
I think you should be correcting the problems with your system before further installing any more software, download and run the first 4 tools from here http://forum.avast.com/index.php?topic=53253.0 and attach ( not copy paste ) the logs created to your next post for one of the malware specialists to look over.
As Craig states there are probably still remnants of the infection on the system
Thanks fellows…
You’re welcome