|I ask now whether that string pops up in My Computer as ie a hard drive. Or is it a actual pop-up window? If it pops up as some kind of removable media, check to see whether you have 2 keyboards plugged into the computer. This could also be representing an OS error. Like it is detecting a keyboard device, even though none other than the primary keyboard are attached. Also check System Restore. How long has this been going on? If it gets severely bad, then check for a restore point the computer made before this started happening. From my experience, it won't delete anything, but I would recommend backing up your important files.|
If your keyboard is a USB or one of the Purple adapter ones, perhaps try another keyboard. For now, that is all I have to offer.