Our USB mouse was stolen and a PS/2 OK_520 Mouse that works OK on my Medion PC, running Windows 7 32-bit, if plugged in before booting, is not recognised by Windows 7 64-bit on a Dell INSPIRONone_19T with a 19" Touch Screen. (It is a communal computer available to all residents.)
A USB mouse works OK and the Update Driver option reports: 'driver is up to date'.
Without the USB Mouse, Device Manager/Mice shows only the Touch Screen as a Mouse.
The Add New Hardware option searches but shows nothing and the Troubleshooter says ' device possibly not recognised, alterations made to system, try again.' but it is still not recognised after repeated re-boots.
The BIOS does not seem to have any option to enable a PS/2 Mouse.
The Mouse is very old so maybe it is not 64-bit compatible, or there is no 64-bit driver for one, but how to get one if the device is not recognised?