I am running Windows 7, Home Premium Presently at 64 bit. After some problems, I did a full recovery that was originally 32 bit, but after the successful recovery, now its 64 bit. I did use my recovery discs to help with the recovery but I don't understand how everything is 64 bit now. I did use a program EaseUS ToDo to back up everything on a 1 terabyte external hard drive. I just don't understand why everything changed from 32 to 64 bit. Does anyone have any idea,s? I,m more worried about compatibility issues than anything else.