Tangentbordsfrågan är löst.
Hittade svaret här: Apple - Support - Discussions - Windows 7 RC BootCamp/keyboard problem ...
Där stod att läsa:
* * *
You might try the following (assuming you have an alternative input device in W7RC):
1 - Load the 'Add a device' dialog for bluetooth
2 - Wait until your device is listed and just select it (highlight only)
3 - Right-click (or press 'Alt+Enter') the highlighted item and select 'Properties'
4 - Go to the 'Services' tab and wait until it lists a 'Drivers' check box
5 - Place a check mark in the box and click 'Apply'
6 - Click on the notification balloon that pops up on the right end of the taskbar to watch the progress of installation (it will probably say something like 'Windows Update..'
7 - When done, your device should disappear from the list and should now have functionality (although from my experience not exactly perfectly consistent pairing).
* * *
Det fungerade alltså även för mig. Så 1. Sök (kanske måste starta om tangentbordet). 2. Markera enheten 3. Högerklicka och välj egenskaper. En lista uppdateras. En HID-enhet kommer upp. Markera den och kör Ok... Fungerar!