Bluetooth missing from Device Manager on Thinkpads with W7 build 7057+

I'm mostly posting this to gain feedback whether or not this issue is limited to newer builds of Windows 7 and/or specific to Thinkpads. The behavior is that the internal Bluetooth disappears on post build 7000 of Windows 7, as if you've switched off Bluetooth with the hardware switch.

The workaround I've used and recommended to others so far is to download TPFanControl (and donate), and toggle the Bluetooth hardware directly from inside the TPFanControl GUI.

This is how it looks on my system:


Once toggled, W7 should detect new hardware and your Bluetooth should be detected. It is as if the BIOS/hardware settings are getting mistakenly turned off at some point.