My old pc was Windows 7 Ultimate 64 bit system, I have formatted it in the past so many times with the same disc. I formatted it with the same disk again and it went to 32 bit system but i think it is 32-bit forever now. When I format it with the disk its still the same 32 bit. Tried by downloading Windows 7 64-bit OS but because its 64-bit setup.exe I can't run it now.