Hi
Thanks for this solution - I followed the 4 steps a couple of days ago and it's worked ever since. The only thing which is a tiny bit strange is that you sometimes have to open up an app before you can switch the keyboard over (e.g. IE or Firefox and then you need to click on the address bar, or in Outlook open up a new or existing e-mail, before the hot keys work again. But after you've done that, they continue to work in the inbox, too. Not sure if that explanation is clear.) Whatever, it really works!!
In any case cheers once again. Just goes to show that Microsoft aren't interested in their customers - they wanted me to buy a $50 warranty before they'd look into the problem and try and solve it. They gave me some story about different software packages being mutually incompatible, or said it was a virus...
Thanks!