Another subtle prank, change a PC’s power-saving settings to perplex your victim as her machine mysteriously changes its usual behavior.
The most effective way to adjust these settings is to make the machine go into sleep mode after a minute.
Go to “Power Options” in the Control Panel, select “Change when the computer sleeps,” then set all the options to “1 minute.”
Your victim will be forever waking her machine, as it hibernates at the slightest lapse in action.
to advanced options like system recovery and a command prompt.