How to monitor the system time changing in drivers?

Hi,

I want to know how to monitor the system time changing by the user in drivers (VxD and WDM) and in win32 application.
We are planning to write a program which can shutdown the computer on the specified time. But I found it’s difficult to forbid the hacker to change the system time :frowning:
And another question is how to shutdown or log-off the computer in driver?
Thanks.

-Ray Yang
xxxxx@ybwork.com


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