I have looked in the Device Manager it shows this remote keyboard and indicated that the internal keyboard is a PS2 type is this correct?
Yes this is correct entry
It stopped working just after a Windows update
Well, if this would be an software/update problem, then the keyboard should still work within the BIOS. Right?
Are you able to access the BIOS pressing F2? Are you able navigate within the BIOS?
If not, then this is definitely not a software issue.