topic Re: Performance drop on QV Desktop Clients since installation of KB4601319 in QlikView

Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Mon, 26 Jan 2026 18:19:17 GMT

Since the installation of the Microsoft security update KB4601319 we have noticed a significant drop in performance when using the QlikView Desktop Client software. The desktop client on the server works without problems. However, all desktop clients that connect to the server are affected. Web Access is not affected by this.

Server information: Server 2008 R2 Enterprise, QV Server Version: 11.20.12664.0

Client information: QlikView Desktop Clients 11.20.12664 & 12.20.20300 (same issue)

I know that this server version is no longer supported, but maybe someone has the same problem and has already found a solution for this!?

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Chip_Matejowsky — Mon, 22 Feb 2021 13:28:52 GMT

Hi @Aleks1,

Sorry, this issue doesn't ring a bell to me. If possible, have you tested removing this KB to see if performance is restored to level prior to installation of this KB and confirm issue is due to the KB?

Best Regards

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Mon, 22 Feb 2021 13:30:41 GMT

Yes, we have tested that. Then it works again as before.

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Chip_Matejowsky — Mon, 22 Feb 2021 13:36:54 GMT

I did a Google search on that KB and found this: Microsoft admits Windows 10 KB4601319 issue, promises fix.

So looks like there's a known issue KB4601319 and it is effecting many Windows users globally. I'm not sure how it relates to QV Desktop, but seems that MS is working to correct this KB. Hope that helps.

Best Regards

Re: Performance drop on QV Desktop Clients since installation of KB4601319

PadmaPriya — Mon, 22 Feb 2021 15:27:00 GMT

Hello Aleks,

Thanks for reaching to community.

I have done a research on KB4601319 and seems there is a known issue with the latest windows patch update. Please find the below Microsoft article and also there will be a cumulative update release from Microsoft soon to fix the issue.

https://support.microsoft.com/en-us/topic/february-9-2021-kb4601319-os-builds-19041-804-and-19042-804-87fc8417-4a81-0ebb-5baa-40cfab2fbfde

However you may revert back the server to its good known configuration or uninstall the latest patch.

Let us know if you have any questions.

Thanks,

Padma Priya

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Mon, 22 Feb 2021 15:41:35 GMT

Thank you very much for your answers. I hope Microsoft will also fix this issue. I am already looking forward to the next patchday on 9 March.

Re: Performance drop on QV Desktop Clients since installation of KB4601319

peterwh — Wed, 03 Mar 2021 07:51:50 GMT

Hello @Aleks1 ,

the same problem here. If Windows 10 20H2 is installed und the kb4601319 (february security update) there is an performance loss. Selection will last longer. If you uninstall it -as you described - everything is working fine. But for security reasons our IT department doesn't allow an uninstall.
We even tested KB4601382 (preview for the upcoming march update) and there is the same problem.

Kind regards
Peter

Re: Performance drop on QV Desktop Clients since installation of KB4601319

PadmaPriya — Wed, 03 Mar 2021 09:17:12 GMT

Hello Peterwh,

Thanks for your feedback. Let us wait for next release on March and do let us know your feedback if the cumulative update from Microsoft fixes the issue.

Looking forward to hear from you.

Thanks,

Padma Priya

Senior Technical Support Engineer-Qlik Support

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Wed, 03 Mar 2021 09:56:41 GMT

Hello @peterwh ,

Which QlikView server version do you use? Also 11.20? We also have problems with Windows 10 2004. As you described, we can't skip the security updates either. It seems to be a global problem. Is Qlik considering addressing this issue with Microsoft?

Kind regards

Re: Performance drop on QV Desktop Clients since installation of KB4601319

peterwh — Wed, 03 Mar 2021 10:22:51 GMT

Hello @Aleks1,

this doesn't depend on the server version (btw. we are still using 12.20 SR6 on Windows Server 2016). It depends on the Win10 Version: Win10 2004 und 20H2 have the same base. So KB4601319 is only available for these.

If you have Win10 1909 "KB5001028" is installed and you don't have the performance loss on the client side.

I don't know if Qlik or someone else is addressing this issue with Microsoft. I found nothing else that says this update brings a performance loss. So we can only hope that the upcoming patchday will bring a solution.

Kind regards

Peter

Re: Performance drop on QV Desktop Clients since installation of KB4601319

vannipan — Wed, 03 Mar 2021 14:41:25 GMT

I have the same problem with QV 11.20

Regards
Vanni

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Thu, 11 Mar 2021 16:42:48 GMT

I'm sorry to disappoint you. The new update has not fixed the problem. Same issue with KB5000802 on Windows 10 20H2.

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Chip_Matejowsky — Thu, 11 Mar 2021 18:01:26 GMT

In order for Qlik to address potential performance issue with QV Desktop and MS update KB4601319, the issue needs to be reproducible in a supported version and environment. As both your versions (11.20/12.20) and O/S environment (Server 2008) are both no longer supported, Qlik Support and R&D cannot assist. If you upgrade QV Desktop and O/S to supported versions and experience the same performance issues, and the issues are reproducible, contact Qlik Support for assistance.

Best Regards

Re: Performance drop on QV Desktop Clients since installation of KB4601319

peterwh — Fri, 12 Mar 2021 06:25:35 GMT

Hello @Aleks1 ,

there also is a update for .net framework which should address a performance problem (KB4601554). Did you install this too? I have this update only on my private computer which doesn't use QlikView, so I can't test it.

Kind regards

Peter

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Aleks1 — Fri, 12 Mar 2021 10:04:51 GMT

Hello all,

the .net update is also installed. However, I just tested it with the "newer" desktop client v.12.30 SR5 and it seems to work. I don't want to install the latest client version as the server is on 11.20 base. We want to move to a new qlikview server with completely new applications this year. That's why I would rather avoid updating the old server.

Kind regards

Aleksej

Re: Performance drop on QV Desktop Clients since installation of KB4601319

Julien99 — Mon, 29 Mar 2021 07:56:22 GMT

Hello

I have the same issue : since the installation of the Microsoft security update KB4601319 on Windows 10 client desktop we have a significant drop in performance when using web access with Plugin IE QlikView software from Windows 10 client

The web access on the server (plugin IE ) works without problems.

Server information: Server 2012 R2 Standard, QV Server Version: 12.50.20200.0

Plugin IE Qlikview April 2020 SR4 12.50.20400.00 32 bits Edition

I installed also update for .net framework which should address a performance problem (KB4601554), but the problem remains

Another idea ?

Thanks

Julien

Re: Performance drop on QV Desktop Clients since installation of KB4601319

clynch9918 — Tue, 07 Sep 2021 19:06:12 GMT

We had been experiencing this issue for at least 5+ months. We're running QV Nov 2017 SR3 and could not locate any helpful fixes and upgrading our environment was too large of an undertaking at the moment.

We had some Windows updates installed this past weekend and performance has finally returned to normal! I can confirm that KB5005031 is what finally resolved the issue for us. I'm not referring to updating the server, but rather the clients' machines.

Since Qlik never confirmed this issue existed, it's hard to speculate the cause. However, the release notes in the Preview highlighted something that seems like it could be the link:

https://support.microsoft.com/en-us/topic/july-29-2021-kb5004293-os-build-18363-1714-preview-5b94c441-49ce-4f0a-9176-12c07ded2424
"We fixed a rare issue that might degrade performance in applications that call Gdiplus.dll!GdipMeasureString in a tight loop with a new font on each call. This issue occurs after installing Windows updates released on and after February 2021."

Not able to say with 100% confidence, but it does line up with our timeline of when users started experiencing issues.