Thanks for the replys, i am not direct looking for thin clients, we already have some laptops and desktop computers. I was able to install a xenserver onto the laptop, they all support the VT technology needed to run windows virtual machines. but the problem is that i need an other computer to loginto the xen server and connect to the VM to work in it.
I just want to seperate the hardware and software with a virtual layer in between, but stil be able to run the windows on the same machine. So when i start up the laptop for example, and there is just one VM active on the vm Layer it automatic boots this VM.