Keyboards both PS/2 and USB quit working on my main PC

[BirdDad]

I am running windows 8.1 pro and when I lock the computer or it times out and locks sometimes when I return and try to type in my login it doesn't work,no keys are showing up and the enter key does nothing as well and this can be on a combo keyboard/touchpad unit where the touchpad works fine but the keys don't work.
I have checked everything in BIOS and it all looks ok.
Thanks

 

[corkyg]

You can hot plug the USB connector. That somes does the job. For PS2 I believe you have to reboot. The locking process has always been somewhat buggy.

 

[BirdDad]

no it doesn't do the job I have been pluging and unplging and pluging back in the USB keyboards
It is a very strange thing

 

[corkyg]

Are you sure the USB port is good? Can you try a powered USB hub connected to the backplane? Do you have another KB to cross check with?

 

[corkyg]

Since this happened on your main PC, why not try the KB on a secondary PC and see if it is the KB or the Main PC that is the problem?

 

[BirdDad]

Yes the USB prort is good and yes the KB works on other computers I have tried three different kbs and it doesn't matter which port I connect it to.
I have not tried a hub yet
Thanks for trying to help

 

[corkyg]

This tells me there is nothing wrong with the KB. If the port is good, then that points to a KB driver problem.

Using your mouse, go to Device Manager/Human Interface Device/Keyboard and see if you can get a new driver.

 

[BirdDad]

it's not the KB I have tried five different ones when this happens. The mouse works so I know that it isn't locked up.
I have noticed something about it. If my screensaver is on or black screen if I press keys on my KB it works fine however if I use the mouse to get rid of the screensaver at login no KB will work.

 

[corkyg]

What happens if you disable the screen saver? Why is screen saver involved at LOGIN?

 

[BirdDad]

I use a screensaver to make me have to login after five minutes of inactivity-keeps the kid from getting on it and installing anything that says download and install for free. Thanks for trying to help me.

 

[corkyg]

Why not use power management to put the monitor to sleep after n minutes? It can require the same procedure for logging in and does not involve a possibly corrupted app, and it saves electricity.

 

[BirdDad]

thanks for the tip, I will try it.

 

[BirdDad]

I think that it was Kaspersky internet security.
They told me on the phone that it was incompatible with Malwarebytes so I got a refund and uninstalled it and so far have not had that problem again.

 

[Puffnstuff]

Weird, I run Kaspersky and Malwarebytes subscriptions and they both work together.

 

[BirdDad]

Kaspersky told me on the phone to uninstall Mblam
that they were incompatible and another tech told me the same thing. I told them that I wanted my money back and they gave it.
mblam has saved my ass so many times that I can't count.
I am running Eset now.