Moden Setup Host using 50% CPU on Windows 10

Hi,

It is possibly downloading\installing the newer build 10586 "1511" November update...

I'm not real sure how to verify that though...

It is basically a complete reinstall... almost like going from 8 to 10..

Hi Boyan,

Thanks for posting your query on Microsoft Community.

We understand the inconvenience caused and we will try our best to resolve the issue.

To assist you better, please provide few details.

1) Did you make any changes to the computer, prior to the issue?

2) What is the make and model of your computer?

This issue might occur due to any third party application conflict.

I suggest you to preform clean boot and check if it helps.

A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program.

Refer to the below link:

https://support.microsoft.com/en-us/kb/929135

Note: Steps mentioned for Windows 8/8.1, will work fine with Windows 10.

Disclaimer: Please go through the section: How to reset the computer to start as usual after troubleshooting with clean boot of the Kb article to boot the computer in normal startup after fixing the issue.

Hope it helps, reply to us with the status of your issue. We will be happy to assist you.

Hi Santosh,

Thank you for your answer. The only change I can think of is disabling some scheduled tasks, because I had the same problem with taskhostw.exe that I wrote some time ago but couldn't really get an answer for. I disabled the following tasks:

- SystemToolsDailyTest

- PCDoctorBackgroundMonitorTask

- PCDEventLauncherTask

- Optimize Start Menu Cache Files-S-1-5-21-425722031-1204749058-1324440041-1001

- Dell SupportAssistAgent AutoUpdate

Actually I am not sure if all of them were enabled before, but now they all are disabled :-) 

My laptop is DELL XPS.

@slance310: That would be really interesting to get such a big update, as it is running already for a couple of days :)

Hi,

It is big... about 3GB or so...

So, maybe this would make things clearer...

Is Microsoft pushing a new Windows 10 release currently ?  By dates, not vague terms like "recently" or "soon" ?

Is Modern Setup Host a Microsoft application/utility/whatever ?

If so, what is it used for ?  What would cause it to spring to life and take over most of the CPU, network and disk ?

If not, do you know what it is, what it's used for, who's responsible for it, and any ill effects from stopping/removing it ?

If it *is* a Microsoft thing, are there any ill effects from stopping/removing it ?  What *are* the expected results from it ?

Is Modern Setup Host used for multiple things (other app updates, emergency patches, etc) or just for Windows updates ?

In other words, instead of the usual vague "how to troubleshoot a problem that's probably unrelated to the problem you're having" Microsoft advice, how about speaking *directly* to the problem ?

This problem happens to me too.
I guess this is caused by the most recent force update you put in Win 10 last week,

I always check what is going on in the task manager, and this Modern Host Setup is not normal

This only start happen these days, and i did not install anything new this period.

200+ people have this same problem

Here is how this problem start, I leave my notebook for lunch, it goes to idle mode as usual, when i come back , it triggers its antimalware checking (as usual), but after that, this Modern Host Setup start processing and it won't stop since then.

It used my 100% disk usage.

And same here. MSH has DiskUsage at a constant 99%, writing a huge amount of data per second, though not dl anything (since I've noticed it anyway).

My laptop has 8 GB RAM, I guess that's why I can still work, but it's a nuisance.

I wish someone had an official answer before I decide to kill the process (and risk having it restart its thing from scratch if it really is important)...