Re: From the Windows world
You can turn it back on again - it's not permanent, just a pain in the arse.
Regedit:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Start = 1
The updates have been resetting it to 3 because surely nobody has an old keyboard that they're comfortable with...
Just keep a cheapie USB keyboard kicking about to make the change (or use the on-screen one).