It must have been the prolonged heat. My main laptop computer decided just yesterday that it didn't want to Log On any longer. While I am a fair hand at computer repair, and can (given time) untangle most software knots, I do need something to work with. And finally after attempting a few software resets, I did get a message out of it, "computer needs repairs." Great.....
One of the nicer things about laptops is that they are pretty easy to diagnose. There are really only 5 main things that can go wrong. And I at least managed to eliminate 2 of them.
It is not physical. Both Keyboard and Screen appear fine.
It is not power. I can get it to power up, just not bring up an operating system.
So that leaves:
The motherboard. An easy / expensive fix. Go get new computer.
RAM. It can occasionally go bad. Fortunately it is both cheap and easy to replace. I might even be able to load a bit more power under the hood. The only issue - did it corrupt anything else or attempting the software corrections result in needing to reinstall all the programs on the hard drive.
The Hard Drive. It seems unlikely as I did get a response when attempting to reinstall from the backup. But the start sectors could have gone bad. Again an easy fix but mildly expensive. I would likely replace it with a SSD. I don't particularly like Western Digital, but they do offer a 1T drive for about $150.
************ EDITED 10/10/2015 *******************
And the verdict is in, the responsible part is: (fanfare please)
THE HARDDRIVE = yet another Western Digital hard drive has let me down. So far that has been the only brand that has consistently failed on me after about 2 - 3 years. Guess I just have bad luck with that company's equipment. At least all it took with it were the operating system, the latest edition of ACDsee, Microsoft office, and a few easy to replace drivers. I store all my irreplaceable program DATA on separate external drives, and backup EVERYTHING. So nuisance repair and worth confirming it was the drive. As this is the 2nd time it as failed, I have a nice (and surprisingly inexpensive) SSD drive that I will be having installed.