How to Verify Game Files on Steam, Epic and Battle.net

To verify game files, open your game launcher, find the game, and use its built-in check: Steam calls it “Verify integrity of game files,” Epic Games Launcher calls it “Verify,” and Battle.net calls it “Scan and Repair.” Each tool compares the installed files with the official version and re-downloads anything that is missing or damaged.

Verification is the first thing to try when a game crashes on launch, shows missing file errors, freezes at a loading screen, or behaves oddly after a failed update. This guide walks through each launcher, explains what happens during a check, and covers what to try if the problem remains. Menu names change from time to time, so treat the steps as a guide and check the launcher’s support pages if a button looks different.

When Verifying Game Files Helps

A scan fixes problems caused by corrupted or missing data. Typical triggers include an interrupted download, a power loss during an update, a failing drive sector, antivirus software quarantining a file, or a leftover file from a removed mod.

Symptoms That Point to Damaged Files

Look for crashes at the same point every time, error messages naming a missing file or library, black screens at launch, textures or audio that fail to load, and updates that never finish.

Problems Verification Will Not Fix

If the game crashes because of an outdated graphics driver, overheating, unstable memory, or too little system resources, the files are probably fine. A scan will report that everything is correct, and you will need to look elsewhere.

Before You Start: Safety Notes

• Close the game fully, including background processes.
• Make sure you have enough free disk space and a stable connection, because replaced files must be downloaded again.
• If you use mods, back up the mod folder and your configuration first. A scan can restore original files and may overwrite or remove modified ones.
• Saves are usually stored separately or in the cloud, but copy local save folders to another location if the game is important to you.

How to Verify Files on Steam

1. Open Steam and go to your Library.
2. Right-click the game and choose Properties.
3. Select Installed Files from the left menu.
4. Click “Verify integrity of game files.”
5. Wait for the progress bar. When it finishes, Steam may report how many files failed validation and were reacquired.
6. Launch the game to see whether the problem is gone.

The process can take from a few minutes to much longer for very large games, depending on your drive speed. If Steam says all files validated successfully, the installed files match the official ones.

How to Verify Files on the Epic Games Launcher

1. Open the Epic Games Launcher and go to Library.
2. Find the game and click the three dots next to its name.
3. Choose Manage.
4. Click Verify next to the verify option.
5. Let the launcher complete the check. It may re-download parts of the game automatically.

If the Verify option is missing for a game, the title may use a different distribution method or may be managed by another launcher. Check the game’s support page.

How to Scan and Repair on Battle.net

1. Open the Battle.net app and select the game from the left side.
2. Click the gear icon next to the Play button.
3. Choose Scan and Repair, then click Begin Scan.
4. Wait until the scan reports its results, and let the app download any repairs.

Some Blizzard games also have a game-specific repair option in their settings. If scanning does not help, check Blizzard’s support pages for advice on clearing cached data for that game.

Other Launchers at a Glance

The exact wording can vary by app version. If you cannot find the option, search the launcher’s help pages for your game.

What the Scan Actually Does

When you start a check, the launcher reads each installed file, calculates a fingerprint of its contents, and compares it with the official list kept on the publisher’s servers. Files that match are left alone. Files that are missing, changed, or incomplete are flagged and downloaded again.

Why the Result Message Matters

A message saying that some files failed validation and were reacquired is a good sign, because it explains why the game was misbehaving. A message saying everything is fine tells you to look at drivers, system stability, or hardware instead of repeating the scan.

Why Some Files Are Skipped

User configuration files, save data, and settings are usually excluded from the comparison, since they differ for every player. That is why verification rarely resets your options, although a few games keep settings in the install folder, so back up anything you care about.

Where Verification Fits Among Other Fixes

Verification is a cheap, low-risk first step. Compared with a reinstall, it is faster and uses less bandwidth, because only the broken parts are replaced. Compared with driver changes, it affects only the game, so it will not disturb other software.

Try it in this order for a game that will not start: restart the PC, verify the files, update the graphics driver, then check for conflicting software such as overlays or security tools. This order keeps each change small, which makes it easy to tell what solved the problem.

If Verification Does Not Fix the Problem

Update Drivers and Windows

Install the latest graphics driver from your card maker and run Windows Update. Many launch crashes come from outdated drivers or missing system components such as Visual C++ runtimes or DirectX files.

Check Antivirus and Permissions

Security software can quarantine game files and cause the same errors repeatedly. Check the quarantine list and add the game folder to the exclusions if the files are legitimate. Running the launcher as administrator can help if the game cannot write to its folder.

Check the Drive Itself

If verification keeps finding new damaged files, the drive may be failing. Check its health using the manufacturer’s tool or Windows disk checking, and back up important data.

Reinstall as a Last Step

A clean reinstall rules out leftover corrupted configuration. Move or back up your saves first, uninstall the game, delete any remaining folder, and install again, preferably on a drive you trust.

Tips for Large Games and Slow Connections

Verification of a very large game can take a long time on a hard drive and feels much quicker on an SSD. Leave the PC alone during the scan, and avoid playing other games or running heavy downloads at the same time, since that slows both tasks.

If the launcher repeatedly stalls at a certain percentage, pause and resume the scan, restart the launcher, or check that no firewall or VPN is interrupting the connection. Some launchers also let you change the download region in their settings, which can help if your usual server is slow.

On laptops, plug in the charger before starting so the PC does not sleep partway through. A scan interrupted by sleep or shutdown can leave a half-updated install that needs another pass.

Quick Checklist

• Close the game and its launcher helpers.
• Back up mods and local saves.
• Verify files in the launcher.
• Restart the PC and test the game.
• Update drivers and Windows if the crash returns.

Common Mistakes

• Verifying a game repeatedly with no change, rather than moving on to drivers or hardware checks.
• Forgetting that verification may remove or overwrite mods.
• Running the scan while the game or an update is still active.
• Ignoring a failing drive that keeps corrupting files.
• Deleting the game folder by hand instead of uninstalling through the launcher, which can leave the launcher confused about what is installed.

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Frequently Asked Questions

Will verifying game files delete my saves?

Generally no, because saves are stored in separate locations or in the cloud. Still, copy local save folders first if you cannot afford to lose them, and check the game’s support page for details.

How long does verification take?

It depends on the game’s size and your drive speed, and it can range from a few minutes to much longer. If files must be re-downloaded, your internet speed also matters.

Does verifying remove mods?

It can, because the check restores files to the official version. Back up your mods and configuration first and plan to reinstall them afterward.

Should I verify files after every update?

There is no need unless you notice crashes, missing files, or a failed update. Launchers already check updates as they install, so verification is best saved for problem-solving.