Info Win 10 1903 Cumulative Update KB4512941 - High CPU Usage bug

[Colif]

Cumulative Update KB4512941 released Sept 2019 includes an error in Cortana/Search that makes it use High CPU Usage

A work around suggested includes changing a registry setting (if you do this, please backup registry before making any changes - here )

I got a similar problem after Windows 10 update and this was because of ” BingSearchEnabled” which was set to 0.

You’ll find it to :
HKEY_CURRENT_USER, SOFTWARE, Microsoft, Windows, CurrentVersion, Search.

If you set to 1, disconnect and reconnect you’re session, problem can be solved.

It’s a bad news because this setting allows cortana to use web results for the search..

I hope Microsoft will correct this problem because we don’t need to use internet resource to search a file in the pc…

another potential fix is:

Werner suggests the following steps to fix the high CPU load issue with update KB4512941:

1. Before installing the KB4512941 update, back up the following cache folder to a local directory (e.g. D:\Backup):
c:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\cache

2. Then install the cumulative update KB4512941 and the SSU.

3. After the update installation, open the cmd.exe command prompt by Run as administrator and execute the following command.

cd c:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\cache
xcopy /o /x /e /h /k D:\backup\cache\*

Both of these were found here - https://borncity.com/win/2019/08/30...rkaround-for-the-cortana-high-cpu-load-issue/

Another is to simply uninstall the patch.

Microsoft have been aware of this problem for 2 weeks or so as it was reported on INsider. So they should fix it at some stage

Thanks to @gardenman for help with creating this

 

[Jsimenhoff]

They just posted an update for this bug. Find out more info here.

Before installing the update make sure you have the latest Servicing Stack for 1903. You can find that here.

 

[Colif]

This has since been fixed by Cumulative Update KB4515384

loaded it this morning, no 30% usage