Possible issue with KB5083769: BITS/SOAP download timeouts and bitsadmin freeze

CHIHARU SHIBATA 15

I would like to report a potential issue related to the April 2026 cumulative update (KB5083769).

After applying KB5083769, some PCs started experiencing failures in our application's auto-update download process.

Our application supports two download methods:

BITS (Background Intelligent Transfer Service)
SOAP Web Service

When the issue occurs, both methods fail. Specifically, the download requests time out regardless of which method is selected.

Additionally, during the failure state, we observe that the following command becomes unresponsive (appears to freeze):

bitsadmin /list /allusers

A system reboot temporarily resolves the issue. Immediately after restarting, downloads succeed. However, after leaving the system idle for some time (approximately several tens of minutes), the download failures reoccur.

After uninstalling KB5083769, the issue no longer occurs. Even after several hours, downloads continue to work normally.

Based on these observations, we suspect that KB5083769 may contain a defect affecting BITS or related networking components.

This behavior appears to be similar to previously reported issues:

We would appreciate any guidance or confirmation regarding this issue.

JJ IT 25 Reputation points

2026-04-29T19:23:35.4333333+00:00

Related observation: there are separate reports of KB5083769 causing Background Intelligent Transfer Service (BITS) hangs after systems remain idle. In those cases, bitsadmin commands freeze, downloads time out, and functionality returns only after reboot, then fails again after additional idle time. Uninstalling KB5083769 resolves the behavior. This suggests a potential idle-state or background-service deadlock introduced with this update that may be related to other idle-triggered freeze scenarios.

https://www.neowin.net/news/windows-11-kb5083769-update-breaks-bits-and-causes-system-freezes/
Aaron M 5 Reputation points

2026-04-30T17:08:00.85+00:00
I can corroborate this. We are an MSP managing 90+ Windows 11 25H2 endpoints and started seeing a cluster of related issues on 6 machines following KB5083769 installation on April 14th.

Symptoms across affected machines included:

Outlook Classic stopping email delivery to the inbox across all configured accounts with no error displayed — closing and reopening Outlook temporarily resolved it but the issue would recur

NinjaOne Backup file/folder jobs failing silently

DISM failing with networking errors

Windows Explorer network browsing and Network Discovery broken

All machines run the same software stack deployed via NinjaOne RMM and received the patch at the same time. Different client networks, different hardware. The remaining 84+ machines on the same stack were unaffected.

Uninstalling KB5083769 and rebooting fully resolved every symptom on every machine we were able to test. Your BITS theory aligns with what we observed — BITS is the common thread across Outlook OAB downloads, our backup agent, DISM, and Windows Update, which would explain why four completely unrelated services failed simultaneously.

For the one machine past the 10-day rollback window, we are looking at temporarily disabling the BITS service as a stopgap based on the workaround mentioned in this thread.
Bob 30 Reputation points

2026-04-30T21:12:06.21+00:00

Yes, I now note my Network Discovery is broken (and the service giving timeout errors).
Mikael S 0 Reputation points

2026-05-06T12:52:27.93+00:00

I am using Xbox app for windows, playing Call if Duty no longer works since can not synchronize account while starting up game. It freezes. I had 2 weeks of troubles until in realize have to remove KB5083769, unfortunately it could not be removed, had to reinstall windows. In the process my backup did not work (also related to same KB5083769) so after reinstalled windows I found all my personal documents that was supposed to be backupped were missing on the backup drive.
Bob 30 Reputation points

2026-05-12T17:53:46.1433333+00:00

Adding my comment to both the original post and mine further below/above.

The fixes delivered this "Patch Tuesday" would appear to have resolved the issues for me. Immediately after applying them and rebooting, Outlook successfully downloads the Address Book, eMails arrive in a timely manner, Powershell Bits commands no longer hang, BITS Service responds to Stop/Start commands.

As an aside, the additional issue of failing Network Discovery also appears to have been resolved.

Fingers crossed ;-)

(To clarify, this is on a machine that it was not possible to uninstall KB5083769)
CHIHARU SHIBATA 15 Reputation points

2026-05-14T01:07:53.9966667+00:00

Thanks, Bob.

Although this is still based on a single observation (N=1), after applying the May 2026 Windows Update, the download functionality of our application appears to be working correctly again.

I also reviewed the changes included in KB5089549 (May 2026 update): https://support.microsoft.com/en-us/topic/may-12-2026-kb5089549-os-builds-26200-8457-and-26100-8457-28ec2a99-4bbe-481d-a340-5c6cf18d9acb

The following item seems potentially relevant:

[Connectivity] This update improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.

If the issue has indeed been resolved, I suspect this change may be related.
Bob 30 Reputation points

2026-05-14T10:04:04.6533333+00:00

Not to prolong the debate, but all four of my affected machines (three with KB5083769 still installed and one with it unistalled) now appear to have none of the symptoms of failure they exhibited after KB5083769 .

I came to the same conclusion about KB5089549, which is documented as superseding KB5083769 , and installing all the patches from the latter (if not already installed) plus "a few more".
Mike Meinz 6 Reputation points

2026-06-09T15:18:35.0666667+00:00

Over the weekend, I did an in-place repair upgrade to 2026-04 Preview Update (KB5083631) (26200.8328).

I also updated to Microsoft 365 Office (Version 2605 Build 16.0.20026.20140) 64-bit on June 8, 2026.

One of those actions solved the issue, my BITS queue is no longer being blocked. Monitoring the BITS queue (bitsadmin /monitor /refresh 2), I see the Outlook OAB download transferring and completing properly.

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Mike Meinz 6 Reputation points

2026-06-03T19:22:50.6+00:00

Same problem. Started on May 21 when the April Windows 11 update KB5083769 was installed.

Over the weekend, I did an in-place repair upgrade to 2026-04 Preview Update (KB5083631) (26200.8328).

I also updated to Microsoft 365 Office (Version 2605 Build 16.0.20026.20140) 64-bit on June 8, 2026.

One of those actions solved the issue, my BITS queue is no longer being blocked. Monitoring the BITS queue (bitsadmin /monitor /refresh 2), I see the Outlook OAB download transferring and completing properly.
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Maciek 95 Reputation points

2026-05-13T14:01:31.5366667+00:00

I keep BITS disabled.

All is now working well, no problems with Outlook sync anymore, haven't spotted any other issues.
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Neil D 34,430 Reputation points Volunteer Moderator

2026-05-12T19:03:13.0366667+00:00

Problem reports like this should go to the windows Feedback hub for the development team. Winkey + F (key shortcut)

Microsoft don't visit this forum.
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Bob 30 Reputation points

2026-05-12T19:09:18.2066667+00:00

Raising on the Feedback Hub was the first thing I did, before finding people with the same symptoms on here.

Neil D 34,430 Reputation points Volunteer Moderator

2026-05-12T19:45:06.1833333+00:00

Bob. Perhaps you can share a link to your feedback so others can upvote or add to it.

Bob 30 Reputation points

2026-05-12T20:59:57.7066667+00:00

Given that, for me, the affecting issue(s) have been fixed by today's new/updated security fix, upvoting is a bit superfluous now.

But as you've asked - https://aka.ms/AA10y2vw
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Possible issue with KB5083769: BITS/SOAP download timeouts and bitsadmin freeze

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