Antivirus/Internet Security suites seem to really hate me . First Norton gave me problems, then Avira, now BitDefender. Basically, I cannot get the Internet Security 2009 installed on my computer. It will get to the part where it starts writing registry values, then it pops up a notice saying it cannot write a registry key ".DEFAULT ..." (I can't remember the rest). I am given three options: "Cancel", "OK", and "Retry". Retry fails consistently, and OK simply hangs the installer (it's so close to completion, like 90%!). The only option is Cancel, which aborts the installer. BitDefender then notifies me to run the uninstall tool, which I do. I've run the Uninstall tool four times, rebooted my computer five times, run CCleaner and Glary Utilities registry cleaners three times, and searched through the registry and disk twice for any files/entries pertaining to Softwin or BitDefender. I've also tried installing as an Administrator default in Safe Mode, but was notified that my administrator had turned off that privilege. I know I'm not infected by any malware because I just ran a scan with Avira earlier this morning. This has me really stumped : I really liked their Antivirus product and was hoping to trial the Internet Security. Does anyone know of how I can alleviate this problem?