Win10 low RAM

I have a friend with an almost unusable laptop running Win10 64 bit. The 
machine cannot accept more than 4 gigs of RAM.


 From my experimenting  with other low end machines, I've found that 3 
megs of RAM and Win10 32 bit gives much better performance than Win10_64 
and 4 gigs of RAM>

I've been thinking of reloading the OS, but wonder if I'd be better off 
just cloning to a SSD?


Yes, they will get a new machine one of these days bit for now, their 
smartphone is sufficient.