1) Start->run->"regedit"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ Winlogon\SpecialAccounts\UserList\
u desnom prozoru klikni desno dugme pa onda new->DWORD Value
otkucaj "Administrator" i dodeli mu vrednost 1.
2) start-> run-> "gpedit.msc"
user configuration->adminstrative tools->control panel->display->"prevent changing wallpaper"::enable
It's a big mistake to allow computer to realise that you are in a hurry.