Preventing Taskhost.exe and CompTelRunner heavy CPU usage

Mr Morgan · 23 Aug 2016

Hello

I've just dusted off a Windows 7 laptop of mine and it seems that the two processes above grab as much CPU as possible, sometimes up to 80+ % and last for quite some time.

Does anyone know what launches the processes and what I can do to disable them?

I know these are Windows processes so I don't really like to terminate them in Task Manager.

Thanks

Mr Morgan.

TheLovleyGuy · 24 Aug 2016

Hi

So i googled and saw somebody else had this problem but only for Taskhost.exe ,, See the link : The taskhost.exe application consumes 50-60% of the average cpu - Microsoft Community

I would Suggest the following :

1) Download MalwareBytes and make a scan
2) Keep Watch Out of Task Manager (Try To see every minute because it might cool down)

Also See this link for (CompTelRunner.exe) : https://www.giveawayoftheday.com/forums/topic/406122

Thanks

ThrashZone · 24 Aug 2016

Hi and welcome to SevenForums,
I'd imagine windows update service is the issue,
When manually installing updates you need to switch your update settings to Never check for updates and restart the machine first.
You might also double check to make sure the windows update service is not running before attempting to manually installing either of these updates
Switch the service back to default after you're done.

Preventing Taskhost.exe and CompTelRunner heavy CPU usage-service-stop-windows-update.jpg

Windows Update Settings - Change

Make sure KB3020369 is installed if not manually install it this is the main article page with all versions,
https://support.microsoft.com/en-us/kb/3020369
These other links do prompt you to download as soon as you click on them just to give you a heads up :)

Win-7 32 bit
https://download.microsoft.com/downl...020369-x86.msu
Win-7 64 bit
https://download.microsoft.com/downl...020369-x64.msu

Then manually install KB3172605 main article page with all versions,
https://support.microsoft.com/en-us/kb/3172605
KB3172605
Win-7 32 bit
https://download.microsoft.com/downl...172605-x86.msu

Win-7 64 bit
https://download.microsoft.com/downl...172605-x64.msu

After switch your windows update settings back to what you had prior and manually check for updates and the rest should show up shortly.

Mr Morgan · 24 Aug 2016

Thanks to both respondents. Based on the postings above and links therein, I have also removed KB2952664 and disabled the RAC job in Windows Scheduler, and I have checked for KB3020369 and KB3172605 and both are installed.

I did have trouble recently with Windows Update on the laptop in question though.

Now the laptop has been rebooted, I will have to wait and see...

Thanks again.

TheLovleyGuy · 24 Aug 2016

Hi,

Ok ,, I hope your CPU get better ,, here is a photo while my computer have chrome is Running ,, so you can check if you get like me :)

I got Windows 10 Pro (Just To Know :) )