1

I have scanned with avast a few times for virus's but nothing has been found, however.. every time i leave my computer for about 5 minutes the process labelled 'system' which is the 'ntoskrnl.exe' bumps the CPU of the entire machine up to 20-24% which of course spins the fans up high..

The strangest bit, once I press a key or move mouse the machine recognises i am back and system drops off to next to nothing.. I have googled it but cannot see anything that matches this scenario so thought I would ask on here.

enter image description here

After reading through a link (Troubleshoot High CPU usage by the "System" process) from a commenter who has since removed their comment i arrived at..

This link (ntoskrnl.exe!_misaligned_access eats a lot of CPU when idle) which I then found the item within system ramping up cpu is ntoskrnl.exe_misaligned_access+0x3f0

The guys reply in the above thread is to kill processes that end up there.. but I'm not sure if that is wise?

So i turned off the scheduled idle task and this has not made any difference, i just went away to get a coffee, returned to the sound of heavy fan use and cpu up to 20%.. the culprit in task manager, "system"

Community
  • 1
John
  • 139

2 Answers2

1

So it seems, touch wood, that i have finally fixed the issue.

After not getting anywhere with trying to chase down the system process being kicked off when in idle, i decided to install the latest updates.. wooo bad idea..

Down came this incredibly annoying windows 10 reminder. It reminded me about its presence 24/7 with it's logo in my task bar.

After reading a lot of tech posts on how crazy windows is getting with harvesting your data (must be turning in a marketing company :) probably something a little more invading but hey.. that's the world of free stuff right?

Anyway, i stumbled upon this blog post: https://www.hackread.com/microsoft-updates-spy-on-windows7-8-users/

Which bascially says, get rid of these updates:

    KB3075249    !important one
    KB3080149    !important one
    KB2923545
    KB2970228
    KB3035583
    KB2990214
    KB3021917
    KB3068708
    KB2592687
    KB2660075
    KB2506928
    KB2952664
    KB3050265
    KB2726535
    KB2994023
    KB3022345
    KB3022345
    KB2545698
    KB3065987

Find with 1 - run cmd 2 - start power shell 3 - run this command replacing with the rel. code:

get-hotfix -id KB3075249

For each one you find and decide don't want, uninstall with: 1 - run cmd (2nd instance to enable you to keep powershell running) 2 - run this command to remove:

wusa /uninstall /kb:2923545

And guess what.. after removing all the updates mentioned.. my laptops fans no longer go mental when i leave the room for 5 minutes! I wonder what the f**k windows was doing?

Vomit IT - Chunky Mess Style
  • 42,624
John
  • 139
0

Without more information, its hard to say the cause. However, there are both Windows and 3rd party processes that wait till the computer is inactive to run. They do this in order to give the active foreground applications the most horsepower and not to slow down the computer when someone is using it. Processes like defraggers, AV, backups, etc. often wait for inactivity as they can noticeably slow down a system.

Keltari
  • 75,447