Alex Ruben
How To Install Call of Duty Vanguard Without Errors in 2025 (FitGirl Repack)
Trying to get Call of Duty: Vanguard up and running without hitting walls like DLL errors, missing files, or weird freezes can be a pain. Sometimes Windows security or bad extraction ruins the whole process, especially if you’re using repacks like FitGirl’s. This guide walks through practical stuff that’s worked on a few setups—because, of course, Windows has to complicate things more than they need to. By the end, you’ll hopefully have a smooth install, or at least know what to tweak if things go sideways.
How to Fix Common Installation Glitches in Windows
Disable Windows Security Real-Time Protection
This helps because Windows Security sometimes wrongly flags or interferes with repacked files—especially since they aren’t from official stores. When that happens, Windows just blocks or quarantines crucial parts, which makes the setup crash or skip files. Disabling real-time protection is a quick fix, but don’t forget to re-enable it afterward—we want some security, just not during install.
- Open the Start Menu and type
Windows Security. Hit Enter. - Go to Virus & Threat Protection.
- Click Manage Settings under Virus & Threat Protection Settings.
- Toggle off Real-time Protection. Confirm if prompted with Yes.
On some setups, this might not stick very long, or you’ll need to do it again after a reboot. Not sure why it works, but for some reason, disabling it helps the extraction and installation go smoother. Just be careful with what you download if you disable security, even temporarily.
Download The Repack Properly
Get the latest FitGirl version from the official website. Using an old or corrupt archive can cause all sorts of errors, especially ISDone.dll issues or partial extraction failures. Make sure the download isn’t interrupted—they tend to be hefty files, so a stable connection helps.
Installing the Game Without Headaches
After download, proceed cautiously. Double-click the setup, and if it warns you, click Yes. During the setup:
- Select your language, then click OK.
- If your GPU has less than 8GB RAM, check for any extra options like lower texture quality or smaller installation options—some packs let you customize later, so don’t panic if you see options.
- Close background apps if they’re hogging resources—especially Chrome, Discord, or anything with overlays—those can mess with file writes.
- When asked for the install folder, pick a simple path like C:\Games\Vanguard. Avoid long or strange paths, because Windows sometimes chokes on them.
- Uncheck any language packs or optional features unless you really need them; they can interfere.
- Make sure you check all necessary boxes for DirectX, shaders, or other dependencies—these are often included, but double-check.
- Hit Install and watch the process. Sometimes it hangs; on one setup it worked after a few retries, on another, a reboot might help clear up lingering issues.
Post-Installation: Make sure Windows Security isn’t blocking files
This step is kind of weird, but necessary—Windows can throw a fit after installing the game and block some files. Adding your game folder as an exclusion can help it run smoothly:
- Go to Settings > Privacy & Security > Windows Security > Virus & Threat Protection.
- Click Add or remove exclusions.
- Choose Add an Exclusion > Folder.
- Navigate to the game install directory (like
C:\Games\Vanguard) and select it. - Click Select Folder to confirm.
This way, Windows shouldn’t mess with game files anymore, reducing crashes or missing assets.
Re-enable Real-Time Protection
Now that exclusions are in place, head back and switch the real-time protection back on — because leaving it off all the time isn’t a good idea:
- Go to Settings > Privacy & Security > Windows Security > Virus & Threat Protection.
- Toggle Real-time Protection back on.
Launching and Troubleshooting
Finally, find your shortcut or go to your game folder and double-click the game’s executable. Expect some initial textures or shaders to load—this is normal. If the game refuses to run, check if your graphics drivers are up to date, and that the game folder isn’t set to read-only. On occasion, launching as administrator can clear some permission issues as well.
- If you still see errors like “Unable to execute file” or crash on start, revisit your exclusion settings or verify if Windows Defender is still blocking parts of the game.
- Ensure all files extracted correctly—sometimes corrupt archives are sneaky and cause errors.
- Restart your PC if weird issues persist—Windows can be stubborn about applying new settings.
Extra Tips & Common Issues
One annoying thing is if the game crashes after update or Windows updates. Sometimes Windows updates reset security permissions, so keep an eye on that. Also, if a DLL error like ISDone.dll appears, it’s often related to insufficient RAM, bad downloads, or disk space issues. Clearing enough free space and re-downloading the archive can solve that.
Wrap-up
Getting this game to launch cleanly mostly comes down to making sure Windows security isn’t blocking files and that the extraction went smoothly. It’s kind of finicky, but once setup right, it tends to run pretty well without errors. Plus, playing with real exclusions makes a huge difference if you want to avoid weird crashes. Because of course, Windows has to make things harder than necessary. Fingers crossed this helps someone save hours — worked for me, hope it does for you too!
Summary
- Disable real-time protection temporarily during install.
- Download the latest FitGirl repack from official site.
- Install the game carefully, avoiding long paths or unnecessary packs.
- Add the game folder as an exclusion in Windows Security.
- Re-enable real-time protection after setup.
- If errors pop up, check extraction integrity, drivers, and permissions.