Windows 11 26H2 is a major feature update, and many users report problems after installing it. This article covers the most common issues and practical fixes.
The most common problem is an update that gets stuck at a certain percentage or fails with an error. First, check that you have enough free storage — 26H2 needs about 20 GB of free space.
Run the Windows Update Troubleshooter from Settings > System > Troubleshoot. You can also run the PC Health Check app to confirm your device meets the requirements. If these do not help, stop the Windows Update service and delete the contents of the SoftwareDistribution folder. Then restart the service and try again.
Many users notice their PC feels slower right after updating. This is often caused by background indexing and OneDrive syncing. Give it a few hours — the system usually settles down.
If it stays slow, disable unnecessary startup apps in Task Manager and turn on Storage Sense in Settings > System > Storage. You can also reset your power plan to Balanced in the Control Panel.
In the first weeks after the 26H2 rollout, driver issues are the most common complaint. The typical signs are missing audio, wrong display resolution, and Wi-Fi disconnects.
Open Device Manager, find the device with a yellow warning icon, and choose "Roll back driver". If that option is greyed out, visit the manufacturer's website and download the latest driver for Windows 11. Do not rely only on Windows Update for GPU drivers.
A small number of users see a black screen or a boot loop after restarting. First, try to boot into Safe Mode by holding Shift while clicking Restart.
In Safe Mode, run System Restore to go back to a point before the update. You can also use Startup Repair from the Advanced Startup menu. If the screen stays black, unplug all external devices and restart.
Some apps stop working after 26H2. This is usually because the app was built for an older Windows version.
Right-click the app shortcut, go to Properties > Compatibility, and enable "Run this program in compatibility mode". Choose the previous Windows version. Also check the app's official website for an update — most developers release fixes within a few weeks.
If all else fails, use the in-place repair upgrade. Download the official Windows 11 ISO from Microsoft's website, mount it, and run setup.exe.
Choose "Keep personal files and apps". This reinstalls Windows while keeping your data. It fixes deep system corruption and is safer than a full reset. Microsoft typically releases 26H2 in the second half of the year, and this method works for any version.
Why is my PC slow after Windows 11 26H2?
Background indexing, OneDrive sync, and outdated drivers are the usual causes. Wait a few hours, then disable startup apps and enable Storage Sense.
How do I fix a stuck Windows 11 26H2 update?
Run the Windows Update Troubleshooter, clear the SoftwareDistribution folder, and restart the Windows Update service. Check free storage space first.
Can I roll back Windows 11 26H2?
Yes, if less than 10 days have passed. Go to Settings > System > Recovery and choose "Go back". After 10 days the option disappears.
What is the difference between DISM and SFC?
SFC scans and repairs protected system files. DISM repairs the system image itself. Run DISM first, then SFC, for the best result.
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