Make an Error Message to get your friend with a heart attack ...!!! Hahhahaa Looks funny and entertaining ;)
Get the Below code to Notepad and Save it as hackersspot.vbs and then run it :

x=msgbox("your computer is infected", 4+16 , "virus detector") do x=msgbox("Visit hackersspot3.tk or www.acena20.blogspot.com for help", 1+4 ,"shutting down") loop