I bought a Dell Inspiron Mini 1012 the other day - it's a nice netbook replacement for my much travelled eeePC 701. The Windows 7 Starter Edition upgraded nicely to Windows 7 Ultimate in a few minutes.
I have a data plan on my iPhone, and I thought I'd try the standard Bluetooth tether. Although the iPhone & Dell paired successfully, it wasn't quite right. The Dell wanted to install a driver for the iPhone, and it left the phone icon with a yellow exclamation point - it could not find a driver for the Bluetooth Peripheral Device.
1. in the "View Devices and Printers", you should see the iPhone (after pairing). Right click on the phone and select "properties".
Click on Services tab.
Uncheck “Wireless iAP” (wireless internet access point).
That's it. If you want to use the iPhone as a modem, make sure tethering is turned on in the iPhone, and Bluetooth is turned on on both iPhone and computer, then right-click on the phone icon in Devices and Printers and select “connect using -> access point”.
You should now have an internet connection! The iPhone will show a blue bar at the top of the screen telling you the amount of data transfer. You can turn off the iPhone screen if you wish and you can keep using the connection.