Hi,
In Device Manager - Double click the device - Driver tab - update driver (which
may not do anything) - regardless Right Click on it and UNINSTALL - when
complete reboot (that refreshes the stack).
Check with Lenovo Support and forums for known issues. Update or re-install
the drivers (after you have done the above first).
Lenovo Support and downloads
http://www-307.ibm.com/pc/support/site.wss/homeLenovo.do
Lenovo Forums
Hope this helps.
Rob Brown - Microsoft MVP <- profile - Windows Experience : Bicycle - Mark Twain said it right.