Windows 11 25H2 setup: install it and confirm it finished

To finish Windows 11 25H2 setup on your own PC, first make sure the device meets Microsoft’s current Windows 11 requirements, back up your files, and plug it into power. If Windows Update offers 25H2, that’s the simplest install path; if it doesn’t appear or the upgrade fails partway through, you can use Microsoft’s current bootable install method instead. After setup, you can confirm the installation by checking the Windows version and build in Settings.

What to check before you start

Before you begin, make sure the PC is actually eligible for Windows 11 and ready for an upgrade.

• Confirm the device meets the current Windows 11 requirements on Microsoft’s official support page, especially CPU support, TPM 2.0, Secure Boot, and available RAM/storage.
• Back up anything you would hate to lose. A cloud backup, an external drive copy, or both is fine.
• Plug the laptop into power, or make sure a desktop is on a stable power source. Don’t start a feature update on battery alone.
• Free enough disk space for the upgrade. If storage is tight, remove large temporary files, empty the recycle bin, and uninstall anything you no longer use.
• Make sure you have a working internet connection for Windows Update and for any downloads you may need.

If the PC does not meet the current Windows 11 requirements, stop there and fix that first. Don’t try to force an unsupported upgrade just to get to 25H2.

Start the Windows 11 25H2 setup

The easiest path is Windows Update, because that is where Microsoft usually offers feature updates first.

1. Open Settings.
2. Go to Windows Update.
3. Select Check for updates.
4. If Windows 11 25H2 appears, choose Download and install or the equivalent prompt shown on your PC.

Settings > Windows Update > Check for updates

If 25H2 does not appear, don’t assume something is broken. Microsoft often rolls feature updates out in stages, and some devices are offered them later than others.

If Windows Update never offers it, or if you need to install again from bootable media, use Microsoft’s current manual install method for Windows 11 installation media or ISO. The exact tool and page can change, so check Microsoft’s official download page for the current 25H2 media or upgrade path before you download anything. After that, follow Microsoft’s instructions for creating bootable media or starting the upgrade from the ISO.

Finish the prompts and let it restart

Once the download starts, let Windows work through the prompts. You may see requests to accept license terms, choose when to restart, or confirm that apps can be closed. Follow those prompts in order.

Don’t force a shutdown, unplug the machine, or interrupt the restart once the upgrade has moved into the install phase. That can leave the update incomplete and may force recovery steps.

When the restart happens, the screen may go dark, show a spinning indicator, or display messages about updates being installed. That is normal. The system may restart more than once before it returns to the sign-in screen.

If the process stops partway through, check disk space, remove unneeded external devices, restart the PC, and try Windows Update again. If Windows offers a troubleshooter, run it. If the install rolls back after a restart, use Microsoft’s current release health or known issues page and review any error code you were shown before trying again.

A successful finish usually looks like this: you reach the desktop, your files and apps are still there, and Windows no longer shows the upgrade as actively installing in Windows Update.

Check that 25H2 really installed

To confirm the setup worked, check the installed Windows version after you’re back at the desktop.

1. Open Settings.
2. Go to System.
3. Open About.
4. Look under Windows specifications.

Settings > System > About

You want to see Version 25H2 listed there. If Windows shows a different version, the setup didn’t finish on 25H2 yet, even if the PC restarted successfully.

You can also check the build number in the same place if you want a second confirmation. If the version and build are unclear, compare them with Microsoft’s current documentation for Windows 11 25H2, because build details can change across servicing updates.

If setup is missing, stuck, or rolls back

If 25H2 does not show up right away, the safest first move is to wait and try again later. Feature updates are often staged, so the absence of the offer does not always mean the PC is incompatible.

If the update starts but stalls, try these checks in order:

• Confirm you still have enough free disk space.
• Disconnect unnecessary external devices, especially storage devices and peripherals you don’t need for the upgrade.
• Restart the PC and run Windows Update again.
• Run the built-in Windows Update troubleshooter if Windows offers it.
• Check Microsoft’s current release health or known issues page for Windows 11 25H2 before trying again.

If the upgrade rolls back after a restart, that usually means Windows hit a compatibility or installation problem it couldn’t finish cleanly. Don’t keep forcing the same install repeatedly without checking Microsoft’s current guidance. Use the current known issues page, review any error code you were shown, and if needed switch to Microsoft’s official manual install path after you’ve cleaned up storage and confirmed the PC still meets requirements.

If you want the update only after Microsoft has fully offered it to your device, keep Windows Update checked periodically. If you need it sooner and Microsoft provides a supported manual route, use that exact current method rather than downloading random third-party tools.

Conclusion

After the reboot, the setup is complete only if the PC reaches the desktop normally and Settings shows **Version 25H2** under **System > About**. If the update is missing, stuck, or rolls back, use Microsoft’s current guidance before trying the install again.

Frequently Asked Questions

How do I know whether my PC is eligible for Windows 11 25H2?

Check Microsoft’s current Windows 11 system requirements first. If the PC fails those checks, don’t start the upgrade yet.

What if Windows Update doesn’t show 25H2?

That can happen during a staged rollout. Wait and try again later, or use Microsoft’s current official manual install path if it’s available for your device.

Where do I confirm the version after setup?

Open Settings > System > About and look under Windows specifications. You should see Version 25H2 there if the setup completed correctly.