Vista - Weird keyboard issue under Vista

Hi all

I have a weird issue with Vista where, after working fine for a while,
the O/S will suddenly go nuts and start responding weirdly to certain
keys (for example it happened a short while ago, where every time I
pressed 'u' the control panel would open up on accessibility
settings). When this happens the only way I see to get the keyboard
working again is via a reboot. It's not my keyboard hardware; I have a
KVM and can switch to my Linux or Mac and the keyboard is fine; switch
back to Vista and its still messed up.

The only thing I have been able to correlate this with is that it
always seems to start when I have Virtual PC 2007 running an XP VM.
But I can run the XP VM plenty of times without it happening, so its
possible that there is no connection.

It's really annoying; has anyone else experienced this? Any ideas?

Thanks
g.