We purchased 2011 and tried to install. 2010 was removed by the installation proceudre and the new installation appeared to go through correctly. When we tried to register and activate it did not accept the key. We decided to reinstall (just in case there was a problem with the original installation). Uninstall using windows uninstall resulted in the crsahdump screen when rebooting. We were only able to boot the computer in safe mode, and eventually used system restore.
Then tried using the bitdefender uninstall with the same result! Any suggestions on how to solve the problem.