You just might! =D
So, you are in the office suite alone for the hours you mentioned, right? Now, I know this cuts into precious worktime :rolleyes: , but everytime you hear the noises, get up and walk toward them. See if a) you can figure out what's making the noise, or b) take note if it stops as you come toward it. What kind of noise would you say it is? Tapping, rustling, scooting, etc....
I don't know about windows or PC CD players, but the one I use on my Mac, I can set for 'autoplay'. Any time there is a CD in the computer on startup, the CD will begin to play. You can shut this feature off. Check your CD player program to see if it's on or not. So, no other CDs apart from Yanni or Enya have ever started up? Hmm! You might want to start a little journal on these things: the nosies & what happens when you approach; which CD & when it starts up... all that good stuff. ;-)
As for the computer starting up from being completely shutdown (not on sleep), erhmmm.... Can a power surge cause it, or something equally logical!? I don't think so, but I can't be sure. =\
Try taking some pictures! Setting up a video might be a good idea too, provided the boss doesn't think you've lost it.
That time of the month makes us more emotionally sensitive, so it would make sense that we might be more intune at those times. Good point!
Kell