How to Recover Data Lost After Windows Update (2026 Guide)

Those who remember the disastrous October 2018 Windows 10 update know exactly what we’re talking about. Thousands of people who had Known Folder Redirection (KFR), a feature in Windows which redirects default user folders to different location such as a different drive, network path, or OneDrive folder, lost years of their personal data.

You’d think that disaster would have been the wake-up call – but it wasn’t. In February 2020 KB4532693 followed, wiping personal settings, program data, and downloads for another wave of users who had done nothing but install a security patch. 

Fast-forward to January 2026 and the new KB5074109 caused random black screens, affected GPU performance, and broke remote desktop connections. March’s KB5079473 locked users out of their own Microsoft accounts for nine days straight. So if you are sitting in front of your PC right now staring at an empty Document folder after a recent update, unfortunately, you too have become part of this very long and tired club.

What to Do Immediately after Files Go Missing?

Once you realize data is missing, your next step is crucial. Certain actions can make or break your chance of recovery.

• Stop writing to the drive. Don't install software, save files, or continue to use the system if that is possible. A new data written to the drive can overwrite what you're trying to recover.
• Check Windows.old first. When Windows upgrades, it moves your previous installation – including user files from the old profile to C:\Windows.old. It's the most common place "missing" files actually are, and it's accessible via File Explorer before it gets auto-deleted (typically after 10 days).
• Check if your user profile path changed. Major Windows updates occasionally create a new temporary user profile. Your files aren't gone – they're sitting in a folder like C:\Users\TEMP or a renamed profile directory. Check File Explorer under C:\Users\ for any unfamiliar folder names.
• Check OneDrive or any other cloud sync service linked to your system. When syncing is enabled before the update, the missing files may exist in the cloud even if they no longer appear locally.
• Check Previous Versions. Right-click the folder where files were stored > Properties > Previous Versions tab. Windows sometimes preserves Volume Shadow Copy snapshots before a major update runs.
• Don't run CHKDSK or other disk repair tools. Windows may prompt you to repair the drive after an update if it detects an inconsistency. Don't. CHKDSK can truncate or move file fragments in ways that make recovery harder.
• Don't restart unnecessarily. Post-update, Windows often queues additional restart cycles. Each restart can trigger background processes that write to the drive. If files are already missing, delay any further restarts until you've attempted recovery.

If the drive is external, remove it safely. If it’s an internal drive, especially an SSD, minimize further use of the system. Avoid installing software, downloading files, or repeatedly rebooting, since background activity and SSD TRIM operations can permanently reduce recovery chances. Ideally, run recovery tools from another drive or a bootable recovery environment.

Why Do Files Go Missing after Windows Update?

Usually, your files aren’t actually deleted after a Windows update. But they may go missing for a handful of reasons, and once you know which one applies in your specific case, you’ll know which fix to use.

The Update Has Created the Windows.old Folder

When Windows installs a large feature update (for example, upgrading from 24H2 to 25H2) – it doesn’t overwrite your old system instantly. Windows creates a backup of the previous installation into a folder called Windows.old so you can:

• Roll back the update if something breaks
• Recover files or settings
• Restore the earlier version temporarily

This folder contains old installation, user profiles, desktop files, documents, downloads, installed system files, etc. It’s located within the C: drive and is kept for around 10 days after which Windows deletes it to clear up space. So if you notice files missing after an update, Windows.old is the first place to look.

You’re Signed into a Temporary Profile

This trips up a lot of people. After an update, Windows occasionally fails to load your normal profile and quietly drops you into a temporary one instead. Default wallpaper, blank desktop, no Documents, no nothing. Your real files are perfectly safe – you just can't see them because you're logged into a ghost account.

A New Microsoft Account Got Created During the Update

While installing a major Windows update, sometimes, you’re prompted to sign in with or switch to a Microsoft account during setup. When you switch to a different user profile, Windows can suddenly look empty – with none of your old Desktop files, documents, or downloads visible. The catch here is that your original files are probably still sitting inside the previous user profile on the same drive – you’re just logged into a different account after the update.

Windows Lost Redirected Folder Paths

If your documents, desktop, or pictures folders were redirected to another drive or synced through   OneDrive – the update can lose track of those custom paths and make your files look like they’ve vanished. It was also the main cause behind the infamous October 2018 Windows update bug.

Microsoft’s own report clarified that the data loss specifically hit users who had previously used folder redirection and then undone it, not everyone with Known Folder Redirection active. The cleanup code deleted files from the original folder path during that transition. Microsoft fixed the exact cleanup issue responsible, but redirected folders can still create messy edge cases during upgrades.

User Profile Corruption

Updates can often modify your profile settings & registry entries during the time of installation. In case you interrupt the update by turning off your PC [interlink the cluster here], or there’s a power failure, or the migration process fails – your user profile can become corrupted and cause your files to go missing.

Windows Changed the Drive Letter or Hid Your Files

Sometimes, windows may hide certain folders, reassign drive letters, or fail to mount a partition correctly after the update. It is especially common with external drives connected during the update process, where the drive may reconnect under a different letter than before.

Start Here: Which Method Applies to Your Situation

How to Recover Lost Files after Windows Update: 9 Methods

Start with the least invasive fixes first. In many cases, recovering files after a Windows update is more about locating them than rebuilding them. The methods below move from build-in checks to deeper recovery options.

1. Search for the Missing Files

The simplest starting point. Your files may have been relocated to a different folder during the update rather than deleted outright.

• Press Win + E to launch File Explorer.
• Select This PC.
• Click the Search This PC box and enter the name of the file you're looking for.
• You can also search by extension.

The files may also be hidden. Go to File Explorer Options > View > Show hidden files and folders and search again.

2. Check the Windows.old Folder

When you upgrade Windows the system automatically creates a Windows.old folder on your C: drive. It holds your previous installation's data, including personal files from Desktop, Documents, Pictures, Downloads, Music, and Videos.

• Press Win + E and go to the [C:] drive.
• Look for the Windows.old folder.
• Open it, locate your files, and save them to a different location.

3. Log Out of the Temporary Profile

After an update, Windows can sometimes load a temporary user profile instead of your actual one. The result? A blank desktop with missing files, and settings reset – even though your original data is perfectly intact in your real user folder.

• Press Win + I.  
• On Windows 10/ Windows 11: Go to Accounts > Sync your settings.
• If you see the message, “you are logged on with a temporary profile. Roaming options are currently unavailable," you’re in a temporary profile

• On other Windows 11 systems with latest version update: Go to Accounts > Windows Backup
• If sync options are greyed out, that’s the same indicator
• Sign out via Start > User icon > Sign out
• Restart your PC and log back in with your regular account

4. Enable the Administrator Account

When you switch to a new user profile after an update, Windows makes your old desktop, documents, and download folders appear missing. It’s because during the process you may have created a new Microsoft account and your old local account, along with its files, did not carry over. Also the built-in Administrator account that you previously used may get automatically disabled. You have to re-enable it.

For Windows Pro/Enterprise Edition users:

• Press Win + S.
• Type Computer Management and press Enter.
• Go to System Tools > Local Users and Groups > Users.
• Double-click Administrator to open properties.
• If Account is disabled is checked, uncheck it.
• Click Apply, then OK.
• Sign out and log back in using the Administrator account.

For Windows Home Compatible Users:

• Open Command Prompt as administrator
• Run the following command:

• Restart or sign out of Windows
• Log in using the newly enabled Administrator account

5. Restore Using Previous Versions

Windows can take automatic snapshots of your files & folders using the System Protection feature. These snapshots are saved in the background and can be used to restore files to an earlier state – even if they've been lost after an update. This method works independently of File History and doesn't require an external backup drive. But it only works if System Protection was already enabled on the affected drive before the files were lost.

• In File Explorer, find the folder or drive that held the deleted file.
• Right-click the folder > Properties > Previous Versions tab. You can also right-click and pick “Restore previous versions” directly.

• Select a version. The tab lists snapshots by date. Pick one from before the deletion.
• Click Restore (or Open to browse).

6. Restore from File History (Needs Prior Backup)

File History is a Windows backup feature which can restore deleted files…  including those that are no longer available in the Recycle Bin. It creates automatic backups of important locations like documents, pictures, videos, desktop, etc. But it works only if File history was enabled before the files were lost.

• Open File Explorer, navigate to the target folder and click the History under the Home tab

• In the File History window, select the files or folders you want to recover
• Right-click the Green Restore button and select Restore to
• Select a suitable location to save your files

7. Use Backup & Restore (Windows 7)

Backup & Restore is still available in Windows 10 and 11 and works just as well. If you had previously set it up to create full or incremental backups of your system, you can use it to recover files lost after update. It's a reliable option when available – but like the method above, it only works if a backup was created before the files were deleted.

• Go to Control Panel > System and Security > Backup and Restore (Windows 7)

• To restore files, click Restore my files.

• Follow the wizard to complete the process.

8. Use Windows File Recovery (Command-Line Tool)

Windows File Recovery is a free tool by Microsoft which scans the drive directly and attempts to pull back lost files. However, a big trade-off is that it's command-line only and requires sound technical expertise, hence not recommended for beginners. It works on Windows 10 (2004 and later) and Windows 11.

• Download and install Windows File Recovery from the Microsoft Store
• Open it. It'll launch as a Command Prompt window
• Use this basic command structure: winfr source-drive: destination-drive: /mode /switches

• Let the scan run.
• Once done, check your destination folder for recovered files.

9. Use Data Recovery Software (Suitable for Beginners)

If none of the above works, your files may have been genuinely deleted. In such cases, a data recovery software is your last hope. Stellar Data Recovery Professional is a DIY tool that helps recover files lost due to formatting, corruption, deletion, update errors, and more. It is compatible with all the standard Windows file systems and lets you recover from all types of storage drives.

• Download, install, and launch the software on your PC.
• Select the type of data you want to recover and click Next.

• Select the folder location or drive volume you want to search for lost files and click Scan.

• Recovered files will be displayed for you to Preview.

• Select the files you want to retrieve and click Recover to save them at a desired location.

Don’t Let the Next Windows Update Catch You Off Guard

Nobody wants to spend an afternoon recovering files that should never have gone missing in the first place. A few small habits can help you prevent this.

• Create a restore point before every major update
• Turn on File History to automatically keep versioned copies of your files
• Do not rely solely on local drives and keep at least one cloud backup going
• Don’t jump on major feature updates the day they drop. Track issues beforehand
• Leave preview and optional updates alone unless you genuinely want to test pre-release builds

Wrapping Up

While losing files after a Windows update is frustrating, it's rarely permanent. In usual cases the data is still on the drive, just hidden, misplaced, or locked inside a profile you can't currently access. Start with the simpler fixes first – search for the files, check Windows.old, and rule out a temporary profile. If those don't pan out, work your way down to data recovery software. And once you're back on your feet, take twenty minutes to set up File History and a restore point. The next bad update will come eventually – it always does, but it doesn't have to cost you anything.