I'm sorry if this has been covered elsewhere, but it is impossible to search for "Active X Controls," which seems to be the most relevant topic.
I'm not sure why this happened, since I didn't change Active X controls on my computer, but the most recent time after rebooting I get a message from Bitdefender that "One of more Active X controls could not be displayed" and when I try to open the program I get a large white box where the screen should be (see screen capture below).

I did have a trojan that I was trying to remove and possibly this changed the Active X controls (I ended up removing it by deleting the file in my temp folder because I couldn't get the bitdefender virus scan screen to come up).
Any idea how to fix this? If there are no other suggestions, will reinstalling (or removing the 2010 and installing the 2011) fix it?
Thanks for any help.