After installing automatic updates on my TOSHIBA laptop with Windows 8.1 the keyboard no longer works.
Upon examining the details, it appears that updates were installed a day or two before but the issue started only after a reboot.
The following devices are indicated as not working in device manager:
1) HID keyboard device
2) Standard PS/2 keyboard:
"Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 19)"
3) Elan input device:
"This device cannot start. (Code 10)"
There is nothing wrong with the keyboard itself. This computer has a dual boot with a Windows 7 partition. The keyboard works normally in Windows 7. The USB mouse that I prefer to use is working normally.
These are the things I have tried (using the on screen keyboard) without success;
-Uninstalling the Elan software update that I assumed, perhaps incorrectly, triggered the issue.
-Uninstalling the non-working keyboard and related devices from device manager and rebooting.
-Uninstalling the items from device manager and scanning for hardware changes and letting Windows find and install drivers.
-Installing OS appropriate drivers from TOSHIBA's website
-Reinstalling the Elan software update.
-Running the devices troubleshooting software from Microsoft.
I was unable to try undoing any changes with System Restore, because although System Protection for the partition was enabled, there were no restore points. I have no explanation for why that was the case. Isn't Windows supposed to create a restore point automatically when updates are installed? But then again, Windows Update isn't supposed to disable your keyboard either.
I have been unable to find any useful advice online so far.
I would very much appreciate any suggestions.
The specifications for the laptop are as follows:
Toshiba C655d-S5300
64 bit
dual boot with Windows 8.1 Pro
AMD E-300 APU 1.3ghz
8GB RAM
While it's true that this laptop was manufactured before Windows 8 was released, keep in mind that the keyboard has been working in Windows 8/8.1 environment for almost two years.