I just finished building my new PC today. After closing the case, I washed my hands, and dried them off. Then I put the Windows 7 DVD into the drive and installed Windows.
Afterwards, I started worrying: after washing my hands, what if I had some moisture on them when I inserted the DVD into the drive? My hands were not dripping wet, but who knows, maybe I missed drying a few drops.
Windows did install successfully, and the PC is running MemTest86+ now with no errors.
Should I be worried about messing up my PC, or the PC's DVD drive? Or am I just being overly concerned?