Warning on Windows 10 Update (KB4512941) - High CPU usage with Search Index

[Azza ☠]

I suggest checking your Windows 10 search bar, does it open and work still?

CTRL+ALT+DEL > Task Manager

Check the process "Search" CPU and memory usage, is it hogging up 25% or more?

Has your system performance dropped slightly?

This might appear like a virus, but don't worry it's not.

There seems to be a bug in the Windows Update Patch called "KB4512941" affecting a bunch of systems.

If you have this issue, then the quickest and easiest way would be to rolled back that update:

1) Start > Settings (gear icon) > Windows Update > View Update History (option)

2) Uninstall Updates and select the "2019-08 Cumulative Update for Windows 10 Version 1903 for x64-based Systems (KB4512941)"

After uninstalling, the problem will be resolved. If you go back under the Windows Update, it will attempt to download and reinstall it again, but hopefully be patched soon.

[emoticorpse]

I'm up to date but think I'm good. I clicked start menu, and in the search bar typed something, then while results were still displayed and processes seemed normal at 3% cpu usage on idle.

[Azza ☠]

Escrito originalmente por emoticorpse:

I'm up to date but think I'm good. I clicked start menu, and in the search bar typed something, then while results were still displayed and processes seemed normal at 3% cpu usage on idle.

Good to check, I noticed some other systems went fine, but a few have this problem.

The one affected was:

Windows 10 - 64 Bit
Nvidia RTX 2080 Ti

With the latest Nvidia Graphic card drivers. I mention this because the "SearchUI.exe" under Cortana / Search Bar starts to use the GPU 0 - 3D process. It seems to be trying to off-load some of it's processing to the graphics card.

It reports nothing is corrupted on the system files, etc... However, will just continuously waste processing and memory building up an search index file 2GB+ (this can keep increasing in size).

[Azza ☠]

Narrowed it down to those that had previously "disable Cortana" and/or the "Bing call-out" on local searches (for privacy reasons), before updating to this patch.

https://www.zdnet.com/article/windows-10-cpu-spikes-1903-update-brings-fixes-but-also-high-usage-issues/

https://mspoweruser.com/microsoft-appears-to-have-shipped-a-buggy-windows-10-update-even-after-negative-insider-feedback/

Some people have also mentioned it freezes their games or even the Steam Client.

https://appuals.com/latest-windows-10-update-kb4512941-is-freezing-games-fails-to-install-for-many/

[TehSpoopyKitteh]

Found a workaround for it.

https://borncity.com/win/2019/08/30/windows-10-v1903-update-kb4512941-workaround-for-the-cortana-high-cpu-load-issue/

Just backup Cortana's Cache foler (named "cache" ) into a backup directory, then copy it back in after the update installs.

Also make sure to install KB4511555 first.....

[UTFapolloMarine]

sounds like corrupted connections just manually turn off updater

[Vulkan]

Escrito originalmente por Azza ☠:

Narrowed it down to those that had previously "disable Cortana" and/or the "Bing call-out" on local searches (for privacy reasons), before updating to this patch.

https://www.zdnet.com/article/windows-10-cpu-spikes-1903-update-brings-fixes-but-also-high-usage-issues/

https://mspoweruser.com/microsoft-appears-to-have-shipped-a-buggy-windows-10-update-even-after-negative-insider-feedback/

Some people have also mentioned it freezes their games or even the Steam Client.

https://appuals.com/latest-windows-10-update-kb4512941-is-freezing-games-fails-to-install-for-many/

Basically anyone using shutup10 that has disabled cortana will not want to install this update intill they iron out this bug , luckily it's a optional update for now .

[TehSpoopyKitteh]

Escrito originalmente por SavageSoutherner:

Escrito originalmente por Azza ☠:

Narrowed it down to those that had previously "disable Cortana" and/or the "Bing call-out" on local searches (for privacy reasons), before updating to this patch.

https://www.zdnet.com/article/windows-10-cpu-spikes-1903-update-brings-fixes-but-also-high-usage-issues/

https://mspoweruser.com/microsoft-appears-to-have-shipped-a-buggy-windows-10-update-even-after-negative-insider-feedback/

Some people have also mentioned it freezes their games or even the Steam Client.

https://appuals.com/latest-windows-10-update-kb4512941-is-freezing-games-fails-to-install-for-many/

Basically anyone using shutup10 that has disabled cortana will not want to install this update intill they iron out this bug , luckily it's a optional update for now .

And to think of all those times I was told it was safe to use it. I’m using the workaround just in case though..

[TehSpoopyKitteh]

I just updated without replacing Cortana's Cache folder and it seems not that bad. I am not getting a continuous 25% utilization of the CPU as the reports have indicated.

https://steamuserimages-a.akamaihd.net/ugc/782985807871994169/5BC2A85C05A92B4B8D30E8E332249B35C75DA3F0/

And just to prove I successfully installed the update...

https://steamuserimages-a.akamaihd.net/ugc/782985807872475846/6F3823A648CAB02A5B2126D1213924FF2466C7E8/

[UTFapolloMarine]

Escrito originalmente por Teh Spoopy Kitteh:

I just updated without replacing Cortana's Cache folder and it seems not that bad. I am not getting a continuous 25% utilization of the CPU as the reports have indicated.

https://steamuserimages-a.akamaihd.net/ugc/782985807871994169/5BC2A85C05A92B4B8D30E8E332249B35C75DA3F0/

And just to prove I successfully installed the update...

https://steamuserimages-a.akamaihd.net/ugc/782985807872475846/6F3823A648CAB02A5B2126D1213924FF2466C7E8/

stay blessed man

[Azza ☠]

Escrito originalmente por POUusnavy:

sounds like corrupted connections just manually turn off updater

It's not corrupted, I verified all that.

It's a blockage upon Cortana and Bing web-based call outs upon local searching, affecting the new forced calls on the updated "SearchUI.exe"

Something you can either manually do, or use the apps "Spybot - AntiBeacon" or "O&O Shutup 10" and is done on purpose for privacy / security reasons.

Why you would want a web-call upon local searching your own personal files is beyond me.

Location affected:
c:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\cache\

File affecting it:
SearchUI.exe

For those affected:

- Roll back the update "KB4511555"
(or)
- Roll back the privacy blockage
(or)
- The fixes above provided by "Teh Spoopy Kitteh" works, replacing Cortana's Cache folder.
(or)
- Change the Windows registry to force "Bing web-calls" on searches, rather than Cortana.
(or)
- Editing Windows 10 Pro policy rules to block it.

ps: If the cache folder is backed up before installing KB4512941 and the folders are copied back after the update, the CPU load of Cortana (immediately without reboot) goes to 0%.

Thanks goes to "Teh Spoopy Kitteh"

[TehSpoopyKitteh]

Escrito originalmente por Azza ☠:

Escrito originalmente por POUusnavy:

sounds like corrupted connections just manually turn off updater

It's not corrupted, I verified all that.

It's a blockage upon Cortana and Bing web-based call outs upon local searching, affecting the new forced calls on the updated "SearchUI.exe"

Something you can either manually do, or use the apps "Spybot - AntiBeacon" or "O&O Shutup 10" and is done on purpose for privacy / security reasons.

Why you would want a web-call upon local searching your own personal files is beyond me.

Location affected:
c:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\cache\

File affecting it:
SearchUI.exe

For those affected:

- Roll back the update "KB4511555"
(or)
- Roll back the privacy blockage
(or)
- The fixes above provided by "Teh Spoopy Kitteh" works, replacing Cortana's Cache folder.
(or)
- Change the Windows registry to force "Bing web-calls" on searches, rather than Cortana.
(or)
- Editing Windows 10 Pro policy rules to block it.

ps: If the cache folder is backed up before installing KB4512941 and the folders are copied back after the update, the CPU load of Cortana (immediately without reboot) goes to 0%.

Thanks goes to "Teh Spoopy Kitteh"

What is also happening is that ShutUpWindows 10 is causing automatic updates notification to only disappear in 1903 rather than actually stop the process. The accumulative update (KB4512941) is optional, so ShutUpWindows 10 doesn’t make the notification disappear. The update it is hiding is KB4511555...which is a .Net Framework update. Windows disables the .Net Framewoirk before downloading and installing the update. This can cause massive performance issues until the .Net update is installed and your PC rebooted.

So in short, another solution is to roll back from KB4512941 and then first install KB4511555, then do the optional update.

http://www.catalog.update.microsoft.com/Search.aspx?q=4511555

Those are the solutions if you wish to continue using ShutUpWindows 10. If you’re not using it (like me) you won’t need to worry about it. Just install KB4511555 first, then the accumulative update.

[Nx Machina]

Escrito originalmente por Teh Spoopy Kitteh:

Escrito originalmente por Azza ☠:

It's not corrupted, I verified all that.

It's a blockage upon Cortana and Bing web-based call outs upon local searching, affecting the new forced calls on the updated "SearchUI.exe"

Something you can either manually do, or use the apps "Spybot - AntiBeacon" or "O&O Shutup 10" and is done on purpose for privacy / security reasons.

Why you would want a web-call upon local searching your own personal files is beyond me.

Location affected:
c:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\cache\

File affecting it:
SearchUI.exe

For those affected:

- Roll back the update "KB4511555"
(or)
- Roll back the privacy blockage
(or)
- The fixes above provided by "Teh Spoopy Kitteh" works, replacing Cortana's Cache folder.
(or)
- Change the Windows registry to force "Bing web-calls" on searches, rather than Cortana.
(or)
- Editing Windows 10 Pro policy rules to block it.

ps: If the cache folder is backed up before installing KB4512941 and the folders are copied back after the update, the CPU load of Cortana (immediately without reboot) goes to 0%.

Thanks goes to "Teh Spoopy Kitteh"

What is also happening is that ShutUpWindows 10 is causing automatic updates notification to only disappear in 1903 rather than actually stop the process. The accumulative update (KB4512941) is optional, so ShutUpWindows 10 doesn’t make the notification disappear. The update it is hiding is KB4511555...which is a .Net Framework update. Windows disables the .Net Framewoirk before downloading and installing the update. This can cause massive performance issues until the .Net update is installed and your PC rebooted.

So in short, another solution is to roll back from KB4512941 and then first install KB4511555, then do the optional update.

http://www.catalog.update.microsoft.com/Search.aspx?q=4511555

Those are the solutions if you wish to continue using ShutUpWindows 10. If you’re not using it (like me) you won’t need to worry about it. Just install KB4511555 first, then the accumulative update.

KB4511555 on my PC bumps CPU usage to 40% adding KB4512941 bumps CPU usage to 50%

Currently I would not recommend either update to be installed.

I reimaged my drive back after testing and CPU usage was back to 0% usage whilst idle.

[Majestic Turkey]

ran disk cleanup wizard prematurely, rip

[MancSoulja]

KB4512508 was recently installed, but there's no KB4512941 on my system.

[Nx Machina]

Escrito originalmente por MancSoulja:

KB4512508 was recently inatalled, but there's no KB4512941 on my system.

K45122941 is an optional not mandatory update. To find it you need to check for updates. Do not install this update.