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Just upgraded from Win 7 pro x64 to Win 10 pro x64 -- High CPU Usage!

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#1 Louisaz


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Posted 28 October 2015 - 07:22 PM

I note that others have mentioned this phenomenon with moving from Win 7 to Win 10. 


Before upgrading to Win 10, my CPU was idling with little or no usage -- when programs were not being run.  A day after I upgraded to Win 10, my CPU usage -- when the computer is NOT running any programs -- is a relatively consistent 30%.


The Windows 10 forum has some threads that addrss this issue.  I just participated in one with my experiences.  It appears on my PC the culprit is the svhost.exe -- and within that huge aggregation is a service called "wuauserv".  That puppy is consistently accounting for 25% of the CPU usag


Attached File  svchost.exe (netsvcs).PNG   332.05KB   0 downloads


I am told by more experienced Win 10 users that the new OS is simply updating and the CPU usage will settle down when this process is complete.


There are a dozen or more posts on the Internet on how to either turnoff the svchost.exe or make other twerks to reduce the abnormally high CPU usage with Win 10. 


Your comments will be appreciated.






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#2 usasma


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Posted 30 October 2015 - 05:42 PM

This isn't a simple problem, and as such there just aren't any simple solutions.


First off, updating to a newer OS from an older OS is fraught with possible problems.

Most experienced techs will tell you that the only way to reliably upgrade is by doing a clean install.

IME the more well used a system is, the more likely it is that you'll have problems with an upgrade.


As for the theory about the Windows Update thing - there just ain't no "settling down".

It only takes Windows Updates a short while to get updates, then it's done (other than the checking for updates that it does - but that's not even noticeable in most systems).


The most problematic areas that I've seen are:

- Windows Store apps (need re-registering)

- video and audio drivers

- antivirus

BUT, the presence of older programs and older devices can complicate this a lot.

And, unfortunately, the overhead due to the older stuff may not be repairable - so even if you update everything, the older settings in the registry/files may still remain.

In short, it's better to try a clean install.

Here's my canned speech for most W10 problems of this sort:


Otherwise this tends to look similar to many other problems that we've seen with W10 being installed on well-used systems.

There's a couple of things to try:
1)  Run the following command in a Powershell window that's run as an Administrator in order to re-register the Windows Store apps:

Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
From this article:  http://www.thewindowsclub.com/re-register-windows-store-apps
Be sure that Edge is closed (in Task Manager).  Cortana will spit an error as it's still running - don't worry about that for now.

2)  Uninstall your antivirus, then use the removal tool for it (there's a list of most of them here:  http://www.carrona.org/avuninst.html ), then install a freshly downloaded, W10 compatible version.  Some A/V have difficulties with the upgrade, so removing them and then reinstalling them will help how they run.

3)  Download fresh copies of the latest, W10 compatible audio and video drivers for your system.  Then uninstall the current versions from your system.  Then install the freshly downloaded versions.

4)  Get ALL available Windows Updates

5)  Get ALL available, W10 compatible drivers/programs from the manufacturer's website.  If some aren't compatible w/W10, check here about uninstalling them.

6)  Get ALL available, W10 compatible drivers/programs for any add-on hardware and any software that you installed previously.  If they aren't compatible, please uninstall them.

If this doesn't fix things, then post back so we can discuss the following options:
- continuing to attempt to fix this copy of the OS
- Reset of the OS (considering both the "Keep My Files" and the "Remove Everything" options)
- revert to the previous OS (both at less than 30 days, and at more than 30 days since initial update)
- revert to the previous OS with another attempt at installing W10 (I don't recommend this)
- clean install of the previous OS
- clean install of the previous OS, then update to W10 (only needed if a clean install of W10 fails)
- W10 clean install

My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

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