I have a laptop Sony Vaio Model SVF152C29M (Product Name: SVF1521B4E) as described here:
There is Windows 8.1 64bit installed on it.
I start it up, it works normal and after a while, random time, but within minutes, max. 30 min, the keyboard is frozen. I cannot type anything. All the keys are out of functionality.
The mouse pad and the buttons of the mouse pad work without problems.
If I reboot the laptop, then everything is fine again.
If I sign out (log out) from Windows and log in again, then also the keyboard works fine.
For the moment I use the sign out method of reset the keyboard, because is faster than reboot method.
The logout/login takes less than 30s.
Now I have to do that regularly, each 30-60min.
I suppose there is not a hardware problem, but I need your confirmation too.
I expect is a software/driver problem, a clash within Windows registry related with keyboard driver.
I have tried all kind of tricks to make it run, but seems hopeless, including: delete keyboard from Device Manager or tried to update the driver (that takes infinite long and nothing happens) or Windows Repair install. I also used some software to see the keyboard virtual on the screen and check if no key is stuck somehow, pressed down, but all the keys seem to work fine. Nothing helped.
I did not reinstall the Windows from scratch. Maybe that would help, in case is not a hardware problem, but I want to avoid that method.
What do you suggest to do?