i am in the mood for a moderate amount of trolling
Try setting up a bat file that starts at launch that will at some interval play the audio track of Shrek 2 through some form of media player(preferably one that can be opened in the tray to delay people figuring out what is happening).
I once wrote a batch file and deployed it to a group of VM’s in my high school that would make disc drives open and close repeatedly.
Resulted in the high schools small NOC having several servers opening and closing their drives over and over much to the confusion of the IT guy haha
You can also add an random delay between the opening to confuse them even further.
Always add jitter
I once managed to get creds for one of my teachers accounts which would give me the ability to see what anyone was doing at any time and kick and restrict student accounts.
Was so scared of using it i never did though