Vista V1.28 (and above) runs on Windows 7, Windows 8, Windows 10, and Windows 11
Vista V1.27 runs on Windows XP, Windows 7, Windows 8, Windows 10, and Windows 11

Vista is a 32bit program that runs on both 32bit and 64bit machines.
Needs about 10M of disk space generally
TCP/IP interface is required (comes with Win95 and above)
A mouse is required.