New desktop client 33.0.0 constantly consuming 10% CPU on Windows 10 Home (extended support)

📱 Desktop & mobile clients 💻 Desktop
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1

Nextcloud Desktop 33.0.0 upgraded yesterday March 26th, 2026 on Windows 10 Home (with extended support, updated)

Fans constantly spinning with noise, Task Manager showing constantly about 10% CPU used by Nextcloud Desktop, though GUI says everything is in sync.

Using “Stop synchronisation” option does gray out the icon BUT does NOT stop the CPU consumption!

Same desktop version upgraded on Windows 11 Home box does NOT have the same behaviour though targeting the very same Nextcloud server.

Is there any log somewhere to find clues about this?

2

I may have found something about the issue.

When Nextcloud Desktop is using about 10%, there is also “AntiMalware Service Executable” with subprocess "Service Antivirus Microsoft Defender“ also using about the same 10% CPU.

When Defender eventually stops, Nextcloud gets quiet, for some time… before the both do it again!

3

Hello,

It may be related to the same problem I saw on macOS.
See macOS client nextcloud 33.0.0 is contiuously accessing files and consuming CPU time

4

Yes, though we are not using the same OS. But you self-answered your own post and have given a clue.
Using my TaskBar “Open Nextcloud Desktop” popup menu I have the display of a strange message claiming it is impossible to fetch a file server-side. I guess Desktop is trying to fulfill this download in loops and forever?

I have NOT this message on the Win11 box, so I have to search how to clean the Win10 box of this pending request to the server.

More here if I find out something.

5

The bug reports however were for Win 10/11. So if you can find the app and it fixes the problem, you know it is the same problem. And you have to wait for release 33.0.1 (desktop client).

6

On Linux Mint Cinnamon it also uses 10% CPU and has also a big memoryleak!

Auswahl_554

7

also on Arch Linux new as of today:
→ high usage of CPU, MEM, Network, even if all syncs paused!
→ only disconnecting from network stops process

uname -a
Linux leno 6.18.20-1-lts #1 SMP PREEMPT_DYNAMIC Wed, 25 Mar 2026 12:17:34 +0000 x86_64 GNU/Linux
sudo pacman -S --info nextcloud-client
Repository : extra
Name : nextcloud-client
Version : 2:33.0.0-1

Screenshot From 2026-03-30 17-32-15

8

found this presumably related issue:

→ disabling the cookbook app on the nextcloud server appears to solve the issue of high memory and CPU

9

Today Friday April 3rd, 2026, my NextCloud Desktop updated to version 33.0.2, and my problem disappeared.

Something has been changed in this version that fixed my issue.

Thanks to maintainers.

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