Hi Paul,

"igdkmd64.sys" is related to Intel HD Graphics 4600 Kernel Mode Driver.

For me it looks like "igdkmd64.sys" file is corrupted.

So, you can follow the below steps to resolve this issue:

Update All Device Drivers

Problems in device drivers are usually what cause blue screen errors in Windows operating systems. You can try updating all device drivers to fix most of these problems. However, in this case we are pretty sure that it is a graphics driver related problem. You should upgrade the graphics driver to solve this problem.
You can do this by going to your computer manufacturer’s website and looking for your computer model there. Once you find your computer model, download the latest version of the graphics driver and install it on Windows 10. In case you bought the graphics card separately, go to the graphics card’s manufacturer’s website and download the graphics driver from there. 

Uninstall Or Disable The Driver

If upgrading to the new driver isn’t doing you any good, then the manufacturer is probably yet to release a suitable driver yet.
In that case, you should Disable the current driver in Device manager and reboot the PC.
Here’s how you do it:

1. Press Windows Key + X -> click Device Manager
2. Expand the Display Drivers category by clicking the arrow next to it.
3. Right-Click the device -> click Disable

After PC reboot you will not get any igdkmd4.sys error.


I hope this helps.