Your windows licence is legal for 32-Bit and 64-Bit. So I recommend you to reinstall your windows with a 64-Bit image.
There is no reason from the technical standpoint to use 32-Bit anymore, except you have really specific and outdated drivers, which only run on a 32-Bit machine (Pre-War printers f.e.)
https://www.microsoft.com/en-us/soft...load/windows10