Cannot Install Bitdefender

Hello


i was using Bitdefender Antivirus Plus 2012 as trial version few days ago and i was very satisfied with it and i was willing to purchase license , but suddenly yesterday when i started the windows i found Bitdefender's taskbar icon showing as greyed out and is totally disabled i tried to figure out why ? it says cannot start Bitdefender service ..


when i used process explorer i found that the Bitdefender process every time getting executed it getting terminated i thought i have infected with a virus that is killing the process so i installed another antivirus programs and scanned the system with many rootkit , malware scanners and no virus or malwares get detected . then i tried to remove Bitdefender and install it again , when i tried to install it again i found the bitdefender installation is closing and exiting out after a while when it starts to download files from internet .


then i tried to install the full Bitdefender x64 installer and when i try to install it , it show an error "Bitdefender installation has failed" .. i tried to use the Bitdefender uninstaller tool and disable UAC and windows firewall and run the installer as administrator but still no luck :(


i really don't know why this happens and if the reason coz of a virus or a rootkit that's killing the Bitdefender or a problem with the system .


please help me out and tell me what to do .


Thanks in advance

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