Try installing all available Windows Updates and deleting the Construct 2 registry data (HKEY_CURRENT_USER\Software\Scirra\Construct2).
Are you a god??? THANK YOU!!!! Ashley (sorry for the CAPS, but I was really very, very, very happy) I was already preparing to install windows again when I decided to take another look at this thread. I hope this helps others who have this same problem. Thank you so much!