Are you absolutely certain it is freezing? This scan can take awhile. The files which begin
HKEY_CLASSES_ROOT are registry files, these would take awhile to scan, it may not actually be frozen you may not be giving it enough time to scan. A full scan take take more than an hour at times.

Have you run other anti-spy programs like Spybot? If not you might try that first and then Malwarebytes.