Windows 11 users are reporting an update that is creating two separate frustrations at once: failed installations and slower internet after the patch lands. The update in question, KB5089549, has drawn attention because some devices cannot complete the installation, while a smaller number of users say network performance drops after it is installed.
The installation problem is the more visible of the two. On affected PCs, Windows 11 attempts the update, then rolls back automatically after showing the message, “Something didn’t go as planned. No need to worry, undoing changes.”
That rollback behavior prevents devices from getting stuck in a broken state, but it also means the update process can waste time and repeat without success. Reports shared in forums such as Reddit describe machines trying to install the patch over and over before returning to the previous version.
So far, there is no sign that the issue is causing widespread boot failures or permanent damage to the operating system. Even so, the pattern has made some users suspect a compatibility problem, especially since similar installation failures were also seen with another recent Patch Tuesday update.
Compatibility issues remain a likely suspect
Several possible causes have been discussed by users, including hardware configurations, drivers, and the Windows servicing components that manage updates. Those factors are often involved when a patch behaves differently across devices.
The reports also suggest the problem is not limited to one single type of setup. Instead, the failure appears scattered across different systems, which makes it harder to pin down a simple cause.
At this stage, the complaints do not yet look like a mass outage. The issue appears to be spread across a limited number of devices, at least based on the reports circulating online.
Microsoft has not acknowledged the problem
Microsoft has not said publicly that KB5089549 is affected by a known issue. The Windows health dashboard also does not list any problem tied to the latest update or other recent patches.
That absence of an official notice leaves user reports as the main indicator of how widespread the trouble may be. If the number of complaints stays relatively small, the issue may never appear in a formal advisory.
For now, that means users do not have clear confirmation on whether Microsoft will classify the behavior as a broader update problem. The lack of an announcement does not remove the reports, but it does mean the scale is still uncertain.
A second complaint involves internet speed
Beyond installation failures, a smaller group of users says internet performance became slower after the update was applied. Those comments have appeared in Microsoft forums, where users described a noticeable drop in speed soon after installation.
The available evidence is still too limited to confirm that KB5089549 is causing a broad network bug. Slow internet can come from many sources, including the computer itself or the router and network equipment in use at home or in the office.
Because of that, the connection issue should be treated carefully for now. The pattern is concerning, but it is not strong enough to prove that the update is broadly damaging internet connectivity.
What users can try next
When the installation fails, Windows 11 usually restores the previous state automatically after the error appears. Users can still try running Windows Update again, although some reports suggest the patch may fail repeatedly after the first attempt.
Some users have also tried clearing the SoftwareDistribution cache, running the Windows Update troubleshooter, or disconnecting unnecessary peripherals before trying the installation again. For internet slowdown complaints, restarting the network adapter or reinstalling the network driver may help test whether the update is actually involved.
If the patch continues to fail, waiting for the next cumulative update may be the most practical option. With reports still scattered and no official confirmation from Microsoft, many users are likely to keep monitoring whether the issue is addressed in a future patch or through backend changes.
