When Bitdefender Internet Security 2012 (x64) updated to ver 15.0.27.338, and now updated to ver 15.0.31.1282, Surfing the internet is very very hard. Some website is load normal (ex: mp3.zing.vn), most website need to reload a few to load it (Ex: google.com.vn,youtube.com) and some website is not load (Ex: bongdaso.com).This problem is reported in topic "IDM vs Bitdefender" but seems it not support, so I post in new topic. This problem is appeared after Bitdefender's team fix IDM issue. Surfing the internet is the minimum requirements everyday, so We can't wait longer. I using Win 7 ultimate x64, BIS 2012 x64 ver 15.0.31.1282. Please fix now very very soon.