When I tried to install Bitdefender, it popped up a box and says "another version of Bitdefender was found on your system. In order to continue the installation process, you must first remove this version. Do you want to continue? If you click no, you will not be able to install the new version of Bitedefender". After I clicked "Yes". It popped out another window and says "the exception unknown software exception (0xc0000417) occurred in the application at location 0xdac8633c. Click on Ok to terminate the program". I restarted the computer many times. Unfortunately it keeps showing the same problem.