How to check if Win 7 disk is 64-bit?
Quickest way is to go to the drive root. If you have a file named Bootmgr.efi you are running a X64/64-bit version.
Next way is disk size, the x86/32-bit version comes out at ~2.32GB whilst the x64/64-bit version comes out at ~3.0GB.
Lastly, you can go to the drive root and open the autorun.inf file.
In notepad, the 64 bit version shows:
[AutoRun.Amd64]
open=setup.exe
icon=setup.exe,0
[AutoRun]
open=sources\sperr32.exe x64
icon=sources\sperr32.exe,0
The 32-bit version shows:
[Autorun]
open=setup.exe
icon=setup.exe,0