No bluetooth on E520 with Windows 8

I might have missed something, but I noticed I have no bluetooth hardware listed in my device manager in Windows 8 (upgraded from Windows 7) on my E520 (model 1143) (searching for new hardware doesn't give any results). I have installed and reinstalled all Lenovo drivers available on the support site, but to no avail. When I press Fn+F9, I only get the choice  to switch on/off Wifi in the charms bar on the right, but no usual choice to enable/disable Wifi and bluetooth as in Windows 7. What have I done wrong?
Solved!
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Same here, alas. The bluetooth device is not detected ...
Since bluetooth is enable in my bios, I can only guess it has something to do with the Hotkey-drivers: when I press Fn+F9, I only get the charms bar in Windows 8 to disable or enable wifi, and no longer the original Lenovo settings screen in which I could enable or disable wifi and bluetooth separately.
I have removed and reinstalled all Lenovo software and drivers, but to no avail.
EDIT: I tried the suggestion in the last post in this topic: http://forum.thinkpads.com/viewtopic.php?f=70&t=106987 and lo and behold: my bluetooth is working again and the Broadcomm drivers are installed.
It took about 15 minutes but the problem seems to be solved now ...

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