Who, Me? Welcome to another instalment of Who, Me? It's The Register 's Monday column that shares your stories of mistakes, occasional malice, and how you came out the other side. This week, meet a reader we'll Regomize as "Marcus," who told us that in the early 2000s he toiled in a workplace that required workers to lock their Windows NT and Windows 95 workstations before stepping away from their desks. "All sorts of shenanigans could ensue if you did not," he admitted. But after a while the thrill of sending fake ILOVEYOU virus emails ebbed. Marcus and some other colleagues eventually came up with the following prank: Snap a screenshot of whatever was on the screen Open PowerPoint and paste into a blank presentation. Set up the presentation so it would loop until the user pressed "ESC." Hit "Present." Marcus reminded us that when PowerPoint was in loop mode, Windows would not run a screensaver. The screenshot slideware was therefore hard to stop, because just one keypress could restore a victim's PC.…