Hi Channing,
Thank you for your help. I purchased PC Doctor for Windows on 1 Nov 2015. I can't open the application without it crashing, but the install file is "PCDoctorToolbox_6554_49". When I do open it and it does not crash, it asks to be activated again. I enter the info and it crashes. When it tries to run a automated diagnostic (daily?) it crashes. The check mark on the application task bar is present even after the crash. Blue screen message is "interupt_exception_nothandles."
Regards,
Sanford