Group Policy Client Stopped Working on Networking with X360?

> Hello everyone, I have a very annoying problem which I dont find any
> information on. I have a usb adsl modem and 1 100mbit nic on board and 1
> seperate pci nic. I use these to share my internet with the X360 without the
> need for a router and for media sharing. Now since I installed Vista
> occasionally when I need a reboot of the x360 or xbox1 (which I also use as
> media center networked to the pc) I get a error that Group Policy Client
> Stopped Working and a minute later I loose my internet connection and get a
> TCP/IP Error 31 which I'm sure is because of the Group Policy Client, so it
> does work but after a few times reconnecting to the pc and getting its ip I
> get this error and only a reboot fixes it again.
>
> (Using Vista Ultimate X64, USB Modem is a Thomson speedtouch 330)
>
> Does anyone have any idead as to what this error is about and how I might be
> able to fix or how I at least can restart group policy client after the crash
> so I dont need to reboot everytime.
>
> Thanks alot already.
> Kind Regard, John