Computer Problems

I was having trouble with my computer, so I called the computer guy . He clicked a couple buttons and solved the problem. As he was walking away, I called after him, "So, what was wrong?" He replied, "It was an ID Ten T Error." A puzzled expression ran over my face. "An ID Ten T Error? What's that, in case I need to fix it again?" He gave me a grin. "Haven't you ever heard of an ID Ten T Error before?" "No," I replied. "Write it down," he said, "and I think you'll figure it out." I wrote: I D 1 0 T