I usually get a restart everytime i want to play a dvd in powerdvd, i disabled the restart thing and i get a blue screen and at the bottom it says:
“RegKill.sys - address F9F583F5 base at F9F58000, Datestamp 308ad5oe”
whats going on here
Trunks
More info on what your OS is would be useful.
I often find a solution to MS problems here (and there are many, problems that is 
):
http://support.microsoft.com/default.aspx