First place to look is a corrupted driver.
This is a simple first line to try for minor driver problems.
Open Device Manager. Display adaptors is a good place to start. Click on it and it will open to your video card. Right click and select "uninstall device". When the next windows opens do ***not*** check the "Delete the driver software for this device." Just select "Uninstall" box.
Your screen will look wierd for a short while but when it settle down go to top of Device Manager, click on "Action" and select "Scan for hardware changes." This will do a quick reintstall.
Reboot and see if this fixes the problem. If not go through some other devices such as Network adapter, etc.
But with errors like the "nvlddmkm.sys" I would try completely uninstalling the display adapter drivers. Nvidia in your case?
The best app for this is the freeware program DDU
[link|https://www.wagnardsoft.com/forums/viewtopic.php?t=5303|(Display Driver Uninstaller)].
It completely clears out everything to do with your GPU/Display Driver/Video Card Driver - whatever you want to call it.
Read their directions first - don't rush it!
I have fixed many strange problems with this in the past. Corrupted drivers will mess up memory access, settings, etc., etc.