When you have a Bluetooth Mouse or Headset Devices which you add on

your Surface Pro 2 Devices, it can happen that something went wrong with the installation routine.

Or it is just not working. Ok, no problem, lets reinstall it .... Oops, when you go to PC Setting > Devices,

and try to remove the headset or mouse, you cannot remove the device because the remove button is

greyed out.  Try reconnecting the Device to the tablet results in the error

“Adding your device failed. Remove it from your PC first then try again.”

Ok, what now? Try the following:

Press Windows + X keys from keyboard and click Device Manager. Make sure that bluetooth driver is Enabled.

 You may need to display hidden device (ghosted) drivers in Windows 8.1 and remove it.

Go to Desktop mode, click “Libraries” in the taskbar, right-click on Computer, and select Properties.

In System control panel, click Advanced System Settings link from the left pane.

Click on “Environment Variables” button, click on “New” under the “User variables for <***theUsername***>” box,

setup devmgr_show_nonpresent_device for Variable Name and 1 for the Variable Value, and click OK.

Open Device Manager again, select View > Show hidden devices, and right-click on the hidden device and select Uninstall.

that should do the Trick

cheers

Jonny

When you start your Surface Pro2, your Arc Touch Mouse works perfectly.

After awhile, it stops working. To recover the Mouse and make it work again

you have to turn the power of the Arc Touch Mouse off and turn it on again. That helps for awhile, then it stops working again.

When the Arc Touch Mouse stops working you can see the light of the Arc Touch Mouse is still on.

In order to avoid this behavior you should follow the following steps:

Disable power setting from "device manger"-->"Bluetooth"-->"Marvel Avastar Bluetooth Radio Adaptor"-->"Power Management"-->Uncheck "allow the computer to turn off this device to save power"

I hope this helps

cheers

Jonny