I have upgraded to Windows 7, because I'm happy with it. :-) Because I wanted to use the Bluetooth options, I have put myself in search of various dongles. The old, which I still had from the collection box, would not like I actually thought it. Well, long letter short, I thought guck'ste items, Amazon. 'Ve Got the range komp by Win-7. Scoured dongle and am at Numbi Mini and remained its good rating hang. The basic problem that I had was the BlueSoleil software refused to cooperate with my Sony Ericsson phone. The Widcomm driver refused to cooperate with the various dongles that I had. Thought to myself, at the price of Mumbi, kannste nothing wrong. That's why I ordered it. Delivered Ruckzuck, thanks to Handynow, plugged (Schol. In my fingers I needed for a pair of tweezers) and the same made a mistake (who of reading powerful, is a clear advantage), have the BlueSoleil software (purchased version, latest version) installed. Have the sentence read over the description, "the dongle does not work under Windows 7 along with the BlueSoleil Sw". After I had Blue ... uninstalled and the dongle then simply took into operation with the Windows 7 native drivers, I was fully satisfied. Everything worked out perfectly. I then also the Nokia N97 and now the Nokia E52 and the Ericsson via the Mumbi adapter to the PC and everything worked out perfectly. With Mumbi Nano Bluetooth Mini USB Adapter EDR Class2 V2.0 very satisfied and can only recommend him Bin