Hi I bought windows 7 Home edition, which was an upgrade, so I had to have an older version of windows. I bought 32 bit but I want to use 64 to get the most of my ram. Will my serial key work with 64 bit version?
as long as it is the same edition of windows the serial will work with 32 or 64-bit windows. also if going from a 32 to 64-bit OS then you will have to backup all data because it will have to be installed cleanly
When you put the upgrade disc in there will be an option to either upgrade or do a clean install. Since you have a 32 bit version and want to upgrade to 64 bit you will need to do a clean install. It install in the partition you want it to and will dump the old windows into a folder called windows.old where all your files from your previous install will be. I still recommend that you back everything up first as something could go wrong.