In order for PandaPow to work it needs the driver for the virtual TUN/TAP interface device to be installed. This is done by the PandaPow installer, so you don’t have to do anything special, unless this installation fails. If that happens, you need to make sure your system allows unsigned drivers and the run the installation again.
On Windows XP, the policy for driver signing can be reached from the Driver Signing button of Control Panel->System Properties->Hardware. Select the “Warn” option as shown below.
Next, run the PandaPow installer again.
You will now be warned about installing unsigned drivers. Please make sure you do allow the drivers to install, however, otherwise PandaPow will not work.