1) make a new .txt document and open it to edit in Notepad (or similar text editor)

2) paste this code into the text document

Code:
:A
explorer.exe
Goto A
3) Save the file

4) Change the file extension from .txt to .bat

5) Done

When you open this batch file it will spam you with Windows Explorer windows until you close the command prompt window

Another even funnier way to do it would be to make it shut down after opening a specified amount of explorer.exes

To do that replace the above code on step 2 with this code:

Code:
set num=0
:start
if %num%==10 goto end
set /a num +=1
explorer.exe
goto start
:end
shutdown -s -t 5 -c "Your computer has committed suicide. Goodbye"
The if statement where If the number variable = 10 is where you set how many explorer.exe's to open up before it shuts down the computer. After it spams the explorer windows, it will show a messagebox saying "Your computer has comitted suicide" for 5 seconds then it will shut down the computer.

Lots of fun !!