User account settings

Hi,
I'm using Sony Vaio laptop with Windows 8.1.
Recently something happened and the screen became black. I tried to recover the original wallpaper but couldn't do it. At the same time the keyboard stopped working.
I discovered that this is connected to the user account. As I had to reinstall the system anyway, I set a new Windows user account with a different name and the laptop started to work properly.
I would like to avoid changing users in case this situation repeats. Could you tell me what I should do (to change in user accoung settings) if I have similar problem in the future?
Thanks in advance.
Robert

The best way I know of is to make complete system backup Using something like Macrium Reflect (my favorite), back it up when everything works good and do backups every now and than. In case of big trouble, you are just minutes away from properly set system.

I know it can be done by backing up the partition with Windows system.
I thought it could be done by editing parameters of the user account or by changing some system parameters connected with the user account.