Use the system restore feature to restore the PC to the way it was when you knew it was last working. Take note, before you restore, of the updates that were made and disable automatic updates. When you are prompted to install the new updates, install them one at a time, doing a restore point before each one, until the issue arises again. Once you are able to replicate, roll back to the restore point made and upon rebooting, go into updates and select to hide that particular update that is causing the "problem".