my friend's mom is trying to do something on her old computer that runs Vista and google chrome keeps freezing when she tries to type something... I am afraid if I have her download a new version it won't say it is supported what should I do.
If she is still running Vista and Chrome isn't working, maybe attempt using Opera/Safari?
Google dropped support for XP and Vista since Chrome 50.
Fastest solution would be to use older versions of Chrome or Firefox or use other browsers.
Permanent and future proofing solution would be to use an updated and supported OS like Windows 10 or any Linux distribution.