I've worked with Bitdefender for years, but have had terrible problems after installing Bitdefender 2009.
Because boottime took even longer than half an hour, I completely re-installed my system (Windows XP SP3 with all recent updates and hotfixes). After a clean install and installation of Bitdefender it happened again. So I had to re-install again. Twice.
This 'improved product' with updates is total junkware. Bitdefender probably won't repay the many hours it took to get my PC running again, but I'm going to ask for a refund.
Considering this product is intended for protection, there is no excuse for sloppy programming. They should be ashamed. This product is an insult to clients hoping for a decent upgrade and I will never recommend this application to people again.