I purchased BitDefender Anti-Virus 2009 with a registration key for three PCs, but I’ve been unable to update my older version because the upgrade option on the main menu is grayed out. After I ...

Bitdefender has long been one of the most popular antivirus tools, protecting more than 500 million users around the globe. In recent years, Bitdefender launched additional security tools to protect ...

It's a good thing I disabled BitDefender when I installed my OS. It never seemed all that helpful, but it certainly slowed down my system greatly. Click to expand... If you "disabled" it then you ...