Is there any solution to prevent system Shutdown, Standby...?
Yes, Don´t Sleep is a small portable program to prevent system shutdown, Standby, Hibernate, Turn Off and Restart. Particularly useful when old programs run on Windows 7 or Windows Vista.Provides more aggressive power-saving features with new rules. But not only that, it also prevents logging off the computer, and the deactivation of the monitor or activation of the screen saver.

Also, Don´t Sleep has a timer that allows time control unblock, or shutdown the computer for a specified time.
Don´t Sleep does not have to be installed and can be executed easily from the desktop, and can be carried on a small usb-stick or other memory device.
Download Dont Sleep v3 : Download