X200t W7 USB Keyboard Trackpoint Issue

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Hello,

I have an X200 tablet that I recently upgraded to windows 7. Following the upgrade, the trackpoint on my Lenovo Ultranav USB keyboard is no longer functional. I've tried downloading and installing the driver:

http://www-307.ibm.com/pc/support/site. ... MIGR-73235

...but without any success. The keys on the keyboard are functional- the only problem is with the trackpoint.

Does anyone have any ideas?

Many Thanks!

B