Windows 95, 98, 98 SE, ME, NT 3.1, NT 3.5, NT 4.0, 2000, XP, Vista, 7, and 8 all have 32 bit versions of their installation software available to them.
Windows 3.1 was a 16-bit OS, but was the first Windows OS to introduce support for 32-bit program calls, albeit in a very early form.
Am I running 32-bit Windows?
- Users ask this question when downloading software, if there are separate versions for 64-bit and 32-bit Windows.
- In Vista, open the System control panel by right-clicking Computer and choosing Properties (either on the Start Menu or in Windows Explorer)