The Windows 10 32-bit ISO serves a specific niche for legacy hardware support. While it is robust and usable, users should be aware of the hard RAM limit and the dwindling support for modern applications. For any hardware capable of running 64-bit, the 64-bit version of Windows is strongly recommended for security, speed, and software compatibility.
A valid Windows 10 Retail license key works for both 32-bit and 64-bit versions. windows 10 32 bit iso file