Keyboard Issues

Hi
I have an issue with a clients PC, after installing avast free , then adding the licence file and after a reboot the keyboard would stop working, giving an error in device manager “Code 19” after googling the issue for the last few days, I decided to format and reinstall ,

system specs
CPU: i5 650
MB: Intel dq57tm
OS: win 7 Pro x64

after windows updates are installed and all device drivers are install , I install avast, then added the licence key and restarted
and WTF the keyboard stopped working again!
so tried checking out the bios ,
turning off legacy mode and playing with all the other USB options it has
with no luck at all

Any info on this issue would be great,

Cheers
Ben

Read this https://forum.avast.com/index.php?topic=159263.0

Let me guess, you didn’t (tried) to install avast 2015.9.0.2208…

??? are you helping or mocking me

Thanks for your help mate

Your welcome mate