That is close to the limits of Class II BT. The easiest solution would be a 10-15 foot USB extension cable.

The better would be a Class I dongle with a larger antenna.

This is the one I have used for any computer that didn't have BT, and has served me well for years.

http://www.amazon.com/Zoom-Bluetooth-Thumbnail-Class-Adapter/dp/B001OOYSU4/

Mine came with BlueSoleil, which is (IMHO) far superior to the windows bluetooth stack.

Edit: After browsing a bit more I found this unit. It is a better option because the version is much newer.

http://www.amazon.com/Bluesoleil-Certified-Cinolink%C2%AEbluetooth-Standard-compatible/dp/B012ZV95H0

This is my recommendation.

http://www.amazon.com/dp/B012ZV95H0

It is a Class I, so you are going to get incredible range.

And it comes with BlueSoleil, which is a proprietary stack and interface. It will do anything your device is capable of.