DEP setting won't stay after restart

I'm running Vista x64 and trying to set the DEP settings to exclude certain programs, but every time I try to restart the computer, so the setting will take effect, the settings revert to the default settings. Also the clock reverts to 8 hours forward every restart also. Any ideas?

Edit: The clock problem was fixed after going into the BIOS, but still cannot get DEP settings to stay.