Who, Me? Welcome to yet another Monday, and therefore to this week's edition of Who, Me? For those unfamiliar, it's The Register's reader-contributed column that shares your stories of workplace messes, and how you tried to clean them up without dirtying your career prospects.

This week, meet a reader we'll Regomize as "Steve" who sent a short and sweet story about a PC rebuild project.

Steve told us this job involved cracking open a PC to install a new motherboard, and that he and a colleague decided to upgrade the machine's mouse while they were at it.

Once the motherboard was in place, Steve and his workmate tried to make the new mouse work.

But no amount of pushing and wiggling made the cursor move.

"After endlessly pulling the plug out, and plugging it in again, many reboots and lots of swearing, we finally discovered the problem."

• IT manager approved downtime over lunch, but made a meal of it
• The developer who came in from the cold and melted a mainframe
• Security contractor blew the whistle on support crew's viral indifference
• Junior disobeyed orders and tried untested feature during a live robot demo

Steve's had been using the new mouse while trying to make the old one work.

The more recent rodent had therefore never been connected to the motherboard.

It was also effectively an invisible mouse, because Steve and his pal had not tidied their workspace.

"The new one was hidden under the PC's side casing," he admitted.

Have you messed up because your office was a mess? If so, click here to send your story to Who, Me? We'll clean it up and use it on a future Monday! ®