Solution I found and it works for me:
http://www.sevenforums.com/drivers/319261-bluetooth-peripheral-device-no-driver-found.html
- Start > Search > Device Manager > Other Devices > Bluetooth Peripheral Device > Update Driver Software
- Continue from Step 5 to Step 9
Required XDA steps:
Installing Windows Mobile Device Center is not necessary. The peripheral just needs a standard bluetooth COM port driver.
- In the Bluetooth device window, right-click the phone icon and select 'Properties'
- Click 'Hardware' tab then 'Properties'
- Click 'Change settings'
- Select the 'Driver' tab, then 'Update driver...'
5. Click the second option: "Browse my computer for driver software"
6. Click to choose the option "Let me pick from a list of device drivers on my computer"
7. From the list "Common hardware types", Select 'Ports (COM & LPT)'
8. Two droplists appear. Choose 'Microsoft' in the "Manufacturer" list, then 'Standard Serial over Bluetooth link' in the "Model" list
9. A warning window pops up. Ignore it by clicking 'Yes'
- Presto, the device functions properly..