no idea about keyboard shortcuts, but the M$ knowledge-base came up with the following to disable the windows key:
Click Start, click Run, type regedt32, and then click OK.
On the Windows menu, click HKEY_LOCAL_ MACHINE on Local Machine.
Click the System\CurrentControlSet\Control folder, and then double-click the Keyboard Layout folder.
On the Edit menu, click Add Value, type in Scancode Map, click REG_BINARY as the Data Type, and then click OK.
Type 00000000000000000300000000005BE000005CE000000000 in the Data field, and then click OK.
Close the Registry Editor and restart the computer.
If you're not sure about registry editing don't bother as you can cause more harm than good