I purchased BitDefender 2009 with high expectations. I was tired of McAfee slowing down my PC and the BD reviews were very good. The firewall seemed robust and, while the anti-virus scans had a lot of false-positives (i.e., flagging any VB or C source code file as a potential virus) and system startup would have a long delay waiting for the AV to initialize I assumed that I was protected. I assumed wrong. Yesterday my PC got infected. IE & Firefox would have pop-ups appear out of nowhere, google searches were getting redirected and performance sucked. I had configured BD anti-virus to be overly aggressive and protective, so I was surprised. I tried to run a manual scan and BD gave me an error message that it was "unable to scan"! After numerous attempts and a re-boot I re-installed the software so that I could run a scan. A few hours later it reported... NOTHING! other than the usual false-positives. I searched on my pc and found some programs that were identified on the web as malware/viruses such as piddle.exe and other programs/folders in /documents & settings/user/application data that were very suspicious. I uninstalled BD and installed ESET NOD32. It's virus scan IMMEDIATELY picked and cleaned 8 viruses on my PC and identified a root kit operating in memory that it was not able to delete. And, no false positives either. BitDefender failing in its most basic task was the last straw. I had previously contacted tech support for another issue and they never contacted me other than one "form" email a week later to submit files that I had already submitted. I gave it a poor because because if an AV program can't stop you from being infected, the rest of the features don't really matter.