I have several Windows 7 Home Premium 64 bit laptops and one Windows 7 Home Premium 64 bit desktop in the family. After purchasing each, I dutifully created a System Repair Disc. As my stack of repair discs grew, I started wondering if there's really any difference between them. Will a 64 bit repair disc work with any 64 bit version of Windows 7 in either a laptop or a desktop, or are they specific to the PC that created them? Same questions for 32 bit repair discs.