I found the question "below" in the forum (the closest topic I could find) but could not find an answer. Searched the threads, etc. I have the same problem.

I am running xp pro as well and installed (and uninstalled) v1.6 several times. It is finding the malware & etc. problems but becomes "Not Responding"...

"Hi,
While running the program's search and destroy function, the program stops responding. I waited, nothing happens. Had to use "End Task" function to close program. I just re-installed the program. Read through forum for help, tried suggestions. Nothing works. Computer is not over heating, processor working great, etc. Can not figure out what is going on. I have Windows XP Pro for O/S."