If you want the same Prank as in video then you can Copy the code from here.
a=msgbox("Error while opening Computer.Do you want to fix this Error",3+16,"Error")
a=msgbox("Unable to fix this error.Do you want to scan this Computer?",3+48,"Error")
a=msgbox("Alert ! Virus Detected",0+16,"Error")
a=msgbox("Delete System Files",0+16,"Error")
a=msgbox("Virus is copying your Password",2+16,"Error")
a=msgbox("Your Computer is Hacked",0+16,"Error")
1. You can write any number from 1,2,3 or 4 instead of 0 (before the '+' symbol)
Below is the meaning of these numbers:
0 = OK Button,
1 = OK / Cancel Button,
2 = Abort / Retry / Ignore Button,
3 = Yes / No / Cancel Button,
4 = Yes / No Button,
5 = Retry / Cancel Button
2. You can write 32 or 48 or 64 instead of 16.
Below is the meaning of each number:
16 = Critical Icon,
32 = Help Icon,
48 = Warning Icon,
64 = Information Icon,