Hi Jaclaz, Yes I develop the main Qemu Manager that's been going for about 5 years now. The site is down at the min as it is being merged with another site ready for the release Qemu Manager 7.0 which is quite a big release. I have tried the rundll32 solution above as part of my tests, unfortunately it does not work. The driver is a network card driver. It installs fine if installed via devcon.exe or device manager. I would really like to have an automted way of installing this driver on demand, it will help other users greatly, and add value to the overall program. If you have any other tips it would be appreaciated, Thanks. Dave.