Windows 10: windows security blocking .net runtime optimization service

windows security on windows 11 is sending me many notifications constantly saying that its has blocked parts of .net runtime optimization service because it can not confirm who published it. it has blocked over 20 services to list a few: windowsbase.dll, system.dll, system.xml.dll,mscorlib.dll......

:)

 

.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

 

Securing Windows 2000/XP/Server 2003 services HOW TO

I will try changing their settings sometime, the one thing I've noticed about this guide is that it doesn't list the Windows services that NEED to be left as local system, so some people might not be too sure what they're doing and worry about any that aren't listed. Just a suggestion that you might want to include in any future revisions. *Smile

The non-default ones I have that you have not listed are:

.Net Runtime Optimization Service v2.0.50727_X86
Ati HotKey Poller
ATI Smart
AVG E-mail Scanner
AVG7 Alert Manager Server
AVG7 Update Service
BlueSoleil Hid Service
Bluetooth Support Service
ewido anti-spyware 4.0 guard
iPod Service
Messenger Sharing USN Journal Reader Service
Service Layer
Windows Defender Service

The problem is that the only ones of these I actually use are The AVG and Windows Defender services and occasionally the "Service Layer" service (related to Nokia PC Suite) and the "Messenger Sharing USN Journal Reader Service" (related to WindowsLive Messenger). Anyway, I'll see how much I can secure those and post back how I get on. I'll try to test it sometime this week just I'm a bit waring of changing the AVG settings because the only way to test if it was still working would be for a virus to be detected... and I' rather I didn't get viruses!

 

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.