after entering the Reg-Key DD shuts down and never starts again. What's on there?

Reboot takes no effect.
(Windows 7,
intel(R) Core i5-2400 CPU @ 3.1 GHz 3.40 GHz,
Gigabyte Z77-DS3H,
TBS 6922 PCIe SAT-TV-Card DVB-S2
Thanks for any tipps!
Best regards from Germany /Opepe