Refresh rate dropping from 120hz to 60hz, WHEA-Logger Event ID 17 ?

I've got

OS: Win 10, 64 bit, version 1903, and
GPU: Nvidia Geforce GTX 1070, Driver 441.87 (just rolled back from 445.87, same issue)
Computer: Aorus_X5 V6,
CPU: Intel i7-6820HK @ 2.70 GHz
Ram: 16.0 GB

For the past month my windows refresh rate seems to be randomly switching from 120hz and getting reset to 60hz, which unfortunately makes games unplayable and looking at the screen in general less nice. When this happens the display refresh in the Nvidia control panel is still listed as 120hz, although testing on UFO Test: Refreshrate will then show 60hz. The only way I can change it back to 120hz is by rebooting. If I manually change the display refresh down to 60hz, my laptop screen has crazy tearing and black flashes.

I think this is the same issue as this post (Refresh Rate Changing Itself at Random ). I started a new thread because they erroneously listed it as solved after switching to onboard graphics. My laptop only uses the dedicated gpu so this wouldn't be an option.

I've noticed the windows event viewer has a warning that seems to coincide with the refresh rate changing. It's listed as having occurred 5400 times in the past week, sometimes a bunch will spam at once.
The message is:

A corrected hardware error has occurred.

Component: PCI Express Root Port
Error Source: Advanced Error Reporting (PCI Express)

Primary Bus: Device:Function: 0x0:0x1C:0x0
Secondary Bus: Device:Function: 0x0:0x0:0x0
Primary Device Name:PCI\VEN_8086&DEV_A110&SUBSYS_35581458&REV_F1

I can paste the full message if needed.

I've updated all drivers, then tried rolling them back (unfortunately it seems I can't roll back windows drivers after 10 days installed), but so far no luck fixing this.

Welcome to the forum. Part of the problem is your on an old version of windows and an even newer version due any day as such the drivers for uptodate windows may not work on the old system which why you had to role back

Samuria said:

Welcome to the forum. Part of the problem is your on an old version of windows and an even newer version due any day as such the drivers for uptodate windows may not work on the old system which why you had to role back

My latest updates were 4 days ago (kb4552931). Can you please be more specific?

How are you connecting monitor to pc? Try a different cable.

Windows 1903 is an old version 1909 is current but a new update due any day so a lot has changed

Sorry that was a typo, I've got 1909 and everything is updated. But rolling back nvidia drivers didn't help.

I've got a laptop with a 120hz screen, so no external monitor or cable.