I updated a Windows circumulative update or whatever it was called and also installed the latest GPU drivers from Nvidia.

In this order:
1. Nvidia updates
2. Windows updates

Right after restarting to finish the Windows updates, I noticed very awful light bleeding in patches/groups in the bottom of my screen. The computer in question is a Dell Inspiron 5577. It's an awesome machine, and I really like it. I had a system restore point created before I restarted to install the update, but at the point I created the restore point, the system was prompting me to reboot to finish installing updates. Either way, I've gone back to the restore point and the light bleed is gone, much to my relief, so I know it's not the GPU driver from Nvidia. What caused this, and how can I report it to Dell and/or Microsoft?