Change the start menu search so instead of finding local applications and files, it searches the internet.
Would be even funnier if it used the worst search engine available.
Oh wait…

I shall write a virus that makes the computer play the “USB device detached” sound followed shortly by the “USB device attached” sound. Dee doo. Doo dee. Just that. three or four times a week.

Alt+Tab goes to a random window instead of being in the order of recency

I had a friend who sent me a “Y2K fix” program back in '99. Said it would patch the error so I’d be safe. When I ran it, it swapped the letters Y and K on my keyboard.

I’ll call it Windows 11.

At first it all seems normal, every now and then a random sound effect is replaced by ominous hooting. Every hour, on the hour, a green owl flashes on the screen for a frame or two, it’s eyes boring into you before vanishing. Once every 50 or so times it pumps your volume up, selects speakers as output and let’s loose a screeching hoot. Random popups slowly ramping up “Restart your streak today”, “Where did you go?”, “Duo misses you”. At first just once or twice a day, but steadily increasing in intensity till it’s one every 23 seconds.

A virus that changes the font every time you go to a new page or hit refresh

There’s a 1 in 50 chance that any copy text command cuts the text instead, and vice-versa.

I had a boss that wasn’t exactly technical. I wrote a power shell program that would randomly every 5-30 minutes give a pop-up that said “good job”, which he always said regardless of what was going on. Placed it in his startup folder on his machine. I thought he would figure it out and tell me to knock it off… Well I forgot about it, 9 months later during my annual performance review it popped up while I was looking at his screen. He apologized and just alt tabbed it away.

I offered to take a look and see if I couldn’t stop it, and he said yes and then walked away to take a break. I then deleted the script I put on there. He gave me extra performance points (meaning a higher pay raise.)

When you click the mouse button, the pointer position moves up to 10px in a random direction before applying the click.

I was in college during the years leading up to y2k and supported myself at the time getting IT infrastructure ready. Some friends and I decided to write a “virus” that, on bootup, checks to see if the current date is in the first week of January 2000 and if it is and a backup of the fonts is not found (so it’ll only run once) then it’ll back up your fonts and alter the originals to replace the y character with the k. This affected everything system wide.

That created more chaos than anticipated.

How harmless are we talking? I’m thinking of one that randomly “locks” the next file you try to open that was last accessed over 30 days ago. It prompts you with “File locked by last user, please enter username/email and password”

No matter what you enter, it unlocks the file.

Then the next time it triggers, it prompts you again, but blocks you from using the same username and password.

Rinse and repeat while the user keeps giving you all their user names and passwords over time.

Bootable USB with w11

The version I recall was once if those Flash animations with a cute squirrel or whatever saying something… but it was really quiet so you’d need to turn up the volume to hear. Then partway through it changed to sex stuff and blasted out in a voice like a monster truck announcer

“anal sex dot com, all anal, all the time!”

I did this in high school, it was just a basic script that spawned a warning dialog box (the kind thats always on top) that just said you can’t close this, part of the script action was making tge task scheduler check every few seconds if the script was running… If it wasn’t then run it.

Since I was making the task scheduler do the checking it meant even if you tried to task manager force close the script it would just open again in a few seconds, it was not a permanent task it was a temporary one and every opening of the script would reset that task so basically the only way to get rid of it was to restart the computer as that would clear the task.