Windows 10: .NET Runtime Optimization Service 100% GPU usage when PC idle

Don't know what is causing this but when I search for answers online people are mistaking it for normal CPU usage. It's not using the CPU at all, just the GPU. I saw one answer on Toms Hardware that said it could be malware crypto mining and to do a reinstall of windows. I'm not about to jump to do that though!

:)

 

.NET Runtime Optimization Service

This showed up on my Windows 10 after a mandatory update by Microsoft. Now a perfectly good computer is acting up as usual after updates.

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  Windows 10 Version 1703
  
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  KB4015583 (OS Build 15063.138)
  
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  KB4016251 (OS Build 15063.13)
  

.NET Runtime Optimization Service

Location: C:\Windows\Microsoft.NET\Framework\v4.0.30319

105 KB (107,704 bytes)

68.0 KB (69,632 bytes)

Created: ‎Saturday, ‎March ‎18, ‎2017, ‏‎5:00:01 PM

Modified: ‎Saturday, ‎March ‎18, ‎2017, ‏‎5:00:01 PM

Accessed: ‎Saturday, ‎March ‎18, ‎2017, ‏‎10:37:11 PM

 

Prevent .NET Runtime Optimization Service from running on battery?

When I opened my laptop this morning, it had rebooted itself (after installing updates). Now the .NET Runtime Optimization Service (ngen?) is using quite a bit of CPU while the computer is on battery. I'm wondering, is there any way to ask Windows to defer these tasks until the laptop is plugged in? I had the laptop plugged in overnight but 30% of my battery is gone after less than an hour of usage, which is not the usual situation.

My computer wasn't idle while it was doing this, so I assume its compiling high-priority assemblies after a .Net Framework update from this article.

I checked the windows update history, and it had installed a cumulative update overnight while plugged in. (https://support.microsoft.com/en-ie/help/4038788/windows-10-update-kb4038788). I wish windows would run .net optimisation as part of that process instead of waiting for me to start using the laptop on battery.

 

Prevent .NET Runtime Optimization Service from running on battery?

When I opened my laptop this morning, it had rebooted itself (after installing updates). Now the .NET Runtime Optimization Service is using quite a bit of CPU while the computer is on battery. I had the laptop
plugged in overnight but 30% of my battery is gone after less than an hour of usage, which is not the usual situation.

My computer wasn't idle while it was doing this, so I assume its compiling high-priority assemblies after a .Net Framework update from
this article.

I checked the windows update history, and it had installed a monthly cumulative update overnight while plugged in.

I'm wondering, is there any way to ask Windows to defer these tasks until the laptop is plugged in, or to do it before I unplug the laptop?

I wish windows would run the high-priority .net optimisation as part of the overnight install process instead of waiting for me to start using the laptop on battery.