The upgrade finished and the new desktop is glowing. The next hour decides whether this was a success: confirm activation carried over, test the apps your day depends on, and know exactly how long your way back to Windows 10 stays open - and how to keep it open longer.
Most upgrade guides abandon you at the new desktop. That is precisely where the two things that matter most are still unverified: is this copy activated, and can I still go back? Both answers live on two Settings pages, both have deadlines attached, and both are the subject of this page.
Example Recovery screen right after upgrading - the Go back option exists only while Windows.old survives and the 10 day window is open.
Within the first hour on the new desktop, open Settings - System - Activation. On a properly licensed upgrade it reads that Windows is activated with a digital licence, linked to your Microsoft account if you signed in. Check it now, not in a month: if activation did not carry over, the cause sits in your old Windows 10 licence state, and it is far easier to reason about while the upgrade is fresh. A quick slmgr /xpr in Command Prompt gives the same answer in one line.
Run Windows Update once more and install what it offers, including the optional driver updates if a device misbehaves. Then open the two or three programs your day actually depends on - your accounting package, your printer, your VPN, your design tool. The upgrade preserves them by design, but preserved and verified are different words. Five minutes of testing now is what the rollback window below is for.
If something essential is genuinely broken, you have a clean way home, and it is built in:
Ten days can vanish inside one busy week. If you want a longer trial, extend the window before it expires, from an administrator Command Prompt:
DISM /Online /Get-OSUninstallWindow.DISM /Online /Set-OSUninstallWindow /Value:30 - the value is the number of days.Once the window closes, Windows deletes Windows.old and reclaims the space - that part is healthy housekeeping, not a loss. From here the relationship is normal: keep Windows 11 updated, keep your backups current, and let the digital licence do its quiet work. If you ever reinstall Windows 11 on this same hardware later, it activates automatically, because the licence earned during this upgrade now belongs to this machine.
See the full free upgrade done live, step by step, for complete knowledge of the process.
Watch Full VideoBy default, 10 days from the day the upgrade finished. During that window, Settings - System - Recovery offers a Go back option that restores your previous Windows 10 with your files intact, as long as the Windows.old folder has not been deleted. You can extend the window up to 60 days with DISM commands, but only while the rollback is still available.
Your personal files are kept. What you lose is everything installed or changed after the upgrade - new programs, driver changes and settings adjustments made inside Windows 11 - plus any password you changed only in Windows 11, which reverts to the older one. Back up anything created during the trial days before you roll back, to be thorough.
First confirm the state on Settings - System - Activation, then be honest about the starting point: an upgrade carries a licence, it never creates one, so a Windows 10 that was not genuinely activated produces an unactivated Windows 11. If your Windows 10 WAS activated, sign in with the Microsoft account the licence was linked to and run the activation troubleshooter on the same page - that resolves most genuine carry-over failures.