After reading some great reviews, I bought and installed BitDefender Total Security 2010. Problems right from the start--the software issued fatal error messages on attempt to install. That problem was finally solved (well, sort of) by going through some convoluted process involving download of an obscure executable from the BD site, system adjustments, etc. Then another series of errors when trying to do the first signature download. Same kind of deal...talk to 3 different BD techs who have me directly downloading fixes (so apparently they see this kind of thing often enough). BD's first scan turned up such viruses as JPG's that were part of something from MSDN (I'm a developer, MSDN is Microsoft). And it flagged a text file that I had edited myself, which had only names and URLs for several antivirus programs. Weird. In fact, BD took the liberty of deleting that file, despite my being careful to configure it to ask before deleting or quarantining anything. That is a concern-- I have no idea what else it may have deleted. Now after just a day of runtime, the system slows drastically and task manager shows the notorious "seccenter.exe" chewing up 80% of available CPU cycles. The seccenter problem is one that was reported by many almost a year ago. Apparently that was never fixed?! Anyway, I'm left wondering why the favorable reports. The program looks worse than amateurish--it's dangerous if it will delete things like innocuous text files. Anyone with similar experience...did you have any luck with fixes for the bugs? I'm especially concerned with "seccenter", as it is apparently persistent, and has forced users to abandon Bitdefender. BTW, this particular system is a fast Intel Quad Core with 4 gigs ram, running official Win XP SP3 (again direct from MSDN/Microsoft). There is nothing particularly unusual about the system except for development tools, but those are standard Microsoft issue. No other antivirus software installed. I do have other systems configured with other av software; Kaspersky, Trend, etc. While I'm not fond of Trend, it has been a walk in the park compared with Bitdefender.