I had forgotten that I'd run PatchPAE on this old Windows 7 32-bit box. It has 5Gb of DDR2 and now only 3Gb is accessible. Is it likely that a PatchPAE could be made to work with Windows 10 or should I attempt to clean install to 64-bit?
Unfortunately this could be hard as the ATI X1300 video card just says "Cannot Display This Video Mode" so I am using it on a remote desktop connection.