There is a bug with the 2007 version of Ad-Aware which is preventing the program from running properly, in some cases, and preventing uninstallation.
The only solution to this bug is to remove Ad-Aware 2007 and update to AE (Anniversary Edition). The details of the workaround can be found here
Please read this topic and follow the instructions before posting, if you have trouble after following these steps then please feel free to post for help!
Casey