Alex Ruben
How To Install FitGirl Repack and Resolve Crashes and Errors in 2025
Installing FitGirl Repack games isn’t always smooth sailing. Sometimes, you hit errors like ISDone.dll or Unarc.dll crashing the party right when you’re trying to get your game running. Maybe your PC is a bit low-end, or Windows is just being its usual stubborn self, blocking files or interfering with the process. This walkthrough is about covering the most common fixes and tricks that actually worked on multiple setups, not just theoretical stuff. Expect a bit of trial and error, but hopefully, these steps get your game installed and playing without ending in tears.
How to Fix Common Installation Errors with FitGirl Repack Games
Disabling Antivirus and Real-time Protection
Often, Windows Security’s real-time protection (or third-party antivirus) mistakes parts of the repack files as threats, causing errors during install. Disabling it temporarily helps. It’s kind of weird, but it works on some setups, while others still have to tinker around and add exclusions later. When you disable the protection, expect the installer to run a bit more smoothly, and sometimes, those DLL errors just stop happening.
- Go to Start Menu and type Windows Security. Open it up.
- Head to Virus & Threat Protection.
- Click on Manage Settings.
- Turn off Real-time Protection. Confirm if prompted by clicking Yes.
Pro tip: If you use any third-party antivirus, disable or pause it too, because Windows Defender isn’t the only culprit here.
Running the Setup with Administrator Rights
Got occasional permission errors? Running the setup as admin helps. Not sure why, but Windows tends to lock down some folders unless you’re the boss.
- Right-click the setup file.
- Select Run as administrator.
This can resolve issues where Windows blocks certain files from being written or executed properly, which happens sometimes when the installer complains about missing files or crashing unexpectedly.
Choosing the Right Install Location
Installation path matters. Installing directly on system drives or in special folders can cause issues. Best to pick a dedicated folder, like C:\Games\GameName. Keep the game files outside of Program Files or Windows folders; Windows tends to restrict write permissions there, especially on newer versions.
- Use the browser to navigate to Destination Folder.
- Create a folder if needed (e.g.,
C:\Games\Fallout4Repack). - Click Next.
Memory Limit Settings in Installer
If your PC’s low on RAM and the installer has an option like “Limit installer to 2 GB of RAM,” toggle that. Sometimes, not setting it causes crashes or hangs, especially on older machines. Because, of course, Windows has to make it harder than necessary.
- Check the box if you notice your system struggles during install.
- On some systems, unchecking this or setting it appropriately feels to make a difference.
Add Folder to Windows Defender Exclusions
Once installed, Windows might keep scanning game files, which sometimes corrupt or stall the game startup or patching process. Adding your game folder to exclusions helps prevent that.
- Go back to Windows Security.
- Navigate to Virus & Threat Protection.
- Scroll down and click on Add or Remove Exclusions.
- Choose Add an Exclusion, then select Folder.
- Pick your game folder like
C:\Games\GameName.
Re-enabling Real-time Protection
After you’ve added exclusions, turn the protection back on. Sometimes Windows Security is just overzealous and you have to play nice with it. It’s kind of a balancing act—disable for install, then re-enable to keep safe.
- Head back to Windows Security.
- Toggle on Real-time Protection.
Dealing with DLL or CRC Errors
If errors like ISDone.dll or Unarc.dll pop up—especially if they mention insufficient memory or disk space—double-check your system’s RAM and free space. Rebooting can also help, because some processes get stuck or don’t release resources properly. On some setups, running the installer with the Task Manager open in background (press Ctrl + Shift + Esc) and closing unrelated apps reduces conflicts.
On certain setups, verifying your system files with Windows System File Checker or updating your Visual C++ Redistributables (from Microsoft’s official site) might make a difference. Because of course, Windows has to make it harder than necessary.
Extra Tips & Troubleshooting
- Always check if your PC meets the minimum specs. It’s amazing how often people forget this part.
- Make sure your Windows is fully updated. Sometimes, outdated OS components cause install madness.
- Look at the game’s documentation or community forums if a specific error keeps popping up. There’s usually a workaround for weird DLL errors or missing dependencies.
Wrap-up
Installing fitting games from the FitGirl Repack can be a pain, but with these methods, some of those common headaches should disappear. Tinkering around with security settings, running as admin, and choosing the right paths make a huge difference. It’s kind of trial and error, but over time, these tricks stick. Just make sure to keep backups and clear enough disk space.
Summary
- Disable real-time protection temporarily
- Run setup as administrator
- Select a simple, non-system directory like
C:\Games\ - Add game folder to exclusions in Windows Security
- Re-enable protection after setup
- Check RAM, disk space, and dependencies if errors persist
Fingers crossed this helps
Hopefully, this shaves off a few hours for someone. Good luck with your game install — it’s worth it once everything runs smoothly.