keyboard fails after USB keyboard to reconnect

After disconnection and reconnection of my USB keyboard on my Windows 7 PC, seems it to reconnect (recognized in Manager devices, indicator light, USB connect sound pieces), but the keys don't work. Disconnect/reconnect a few times, during the passage of the USB ports eventually again become key assets, but so far I was not able to detect a pattern in what constitutes successful reconnection.

I installed a mouse switch KVM, keyboard and screen between two Windows 7 PCs (both are HP, laptop Elitebook, the other a Pavillion Elite). This problem occurs with the Pavilion, never with the laptop. The problem occurs with or without the KVM switch. The Elitebook is usually started with the keyboard is plugged.

In case of problem, I have done so far:

  • Reconnect using a different USB port looks more often give a positive result, but not always
  • There is no problem with the re-connection of the mouse
  • Device Manager shows no problems. Updated driver that I have the latest driver software (HID compatible keyboard), which is also identical between laptops and desktops. Also no problem in the Device Manager on the USB drivers.
  • I bought another keyboard (Logitech K120) and have the same problem with my native keyboard of HP
  • Unplug all other USB devices and I tried the keyboard connection/reconnection on different ports - no difference
  • Installed the software of Logitech keyboard (driver?) - no difference
  • Reinstalled the software of the driver on the HP website - no difference

There is no other known issues with the computer and when the keyboard is in use (as now, when I'm typing this), everything is great. I searched all over the web and have not found someone with the same problem, at least not in Windows 7.

Any suggestion would be appreciated.

I think I should have solved (fingers crossed). When I went to Control Panel / programs and features, I've seen two HP programs to support the keyboard (a normal keyboard support and the support of an extended keyboard). I deleted (uninstalled) together. So far, things seem to work.

Tags: Windows

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