Look, I get that you don't like the new group policy that locks your workstation after 15 minutes. I even understand your confusion about hitting a key or wiggling a mouse to unblank the computer screen. But do you really need to put in a ticket saying that your computer won't wake up after you shut it down instead of logging out the other day? Or the tickets last week where we remoted in and found nothing wrong?
So, your ticket today was demanding a full investigation. That's why you returned to your desk (where you left your computer unlocked again, by the way), and found the workstation removed. I'm running full tests of everything, so that I can "fully investigate" your issue. No, I don't have a "loaner" computer, feel free to use one of the available workstations in your office area. No, I can't really give you an estimate of the time it will take, as we need to do a full hardware scan, and then I'll need to run a full diagnostic on all of the software settings. Oh, I'll also need to go through the various log files, and make sure that there isn't any errors. Heck, if it's really bad, I might just need to fully reimage it, and install all of your programs from scratch. Gosh, with all of the other work on my plate, it could take days to get that workstation back to you.