What would you be using this for?
-Ath
It seems the capital question. To depure the system , I think.
Nevertheless I would like to try the process is not illegal.....

In the past I think I have tried to reenter in safe mode. We have to modify the msconfig I think.
I usually use Restart because I have so many times installed windows xp pro in the same pc, and ubuntu, as you may know.
What I am looking for is a flexible tool. But don't ask me the exact purpose because I only imagine.
I have six systems under xp. Suppose I want to do some task depending on the system, because each system is specialized.
I am trying at these moments windows 8 because possibly my future pc will goes with multiple virtual machines under w8. But i will continue with xp pro in the backfront.

I usually don't turn off my pc's. They are all the day on.
I have read the system degenerated after many hours turn on.
Depuring the system if often in safe mode.
so perhaps you have an idea what i am looking for, but I would to know is possible anyway.