All pranks here are safe. Still, be sure not to play a prank somewhere you shouldn't. It could get you into trouble. Note: When downloading, be sure to save... not run.
AvidScanner
Similar to the well known "BOSS Scanner", AvidScanner is a more complete "Antivirus" prank. It is fairly realistic looking (sure to fool most). When you perform a "Full system scan" it finds many infections... then comes the classic "failed to repair" nightmare. Great prank to pull on your friends.
Blue Screen of Death
This harmless remake of the dreaded "Blue Screen of Death" that indicates your computer has had a full physical memory dump (even sounds bad!). If you've ever seen the BSOD, this prank will look extra good! Once opened, you get to set the time before the computer should "crash". Once the prank has started, the truth is revealed after 2 minutes and the program is closed.
BOSS Virus Scanner
This cool little virus scanner prank should be able to scare your friends. Download this phony little scanner and tell them to make sure their computer doesn't have any viruses. The program has no indication that it is a prank until the end, so hopefully they will think it is legit! Basically, the prank is that it finds over 200 viruses on your system that cannot be repaired. The classic computer virus nightmare.
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Beep Freeze
This prank seems to "lock up" your computer and makes annoying sounds whenever you click the mouse. No speakers? No problem. The program uses the computer's internal speaker to play an odd series of tones whenever you click somewhere on the screen. Once opened, the prank immediately starts. After running, it will automatically close after two minutes.
CD Drive Prank
This prank will open and close the computer's CD Drive continuously for the user-set amount of time. It runs as a process, so it's a little harder to stop than just closing a window. After the time is up, the program stops opening and closing. Enjoy.
Your Idea Here
Got an idea for a prank? Let me know! I always need new ideas. If you haven't already, sign up for the forums. Then use the link below to get to the right Idea section. Make a new post and tell me what you got.