You can install Windows 10 without a product key and use it for free with some limitations (a watermark on the screen and inability to change wallpapers). However, for full functionality, you will need a valid Windows 10 product key. If you have an old Windows 7 or 8.1 key, it may still work to activate Windows 10, though Microsoft has officially closed that free upgrade loophole.
: Under the Architecture dropdown menu, select 32-bit (x86) . You can also choose "Both" if you want a single USB that works for any system. win 10 32 bit download