Alex Ruben
How To Install FitGirl Repack Games and Resolve Common Issues in 2025
If someone’s ever tried installing those large FitGirl repacks, you probably know it’s not always a smooth ride. Errors like ISDone.dll or Unarc.dll pop up out of nowhere, and the whole process can feel like navigating a minefield — especially with Windows security playing hardball. This guide is here to help get past those hurdles and actually launch your games without headaches. Expect to tweak some security settings, run a few commands, and maybe sweat a little, but it’s worth it to get those games finally working.
How to Fix Common FitGirl Repack Installation Hurdles in 2025
Adjust Windows Security Settings to Avoid False Positives
This step is crucial because Windows Security loves to flag cracked or repacked files, which can prevent installs or cause errors during gameplay. Disabling real-time protection temporarily helps avoid interference, particularly when you’re copying or unpacking huge files. It applies when you’re seeing errors related to corrupted or missing files that *seem* to be caused by security blocks.
- Open the Start Menu and type Windows Security. Click to launch.
- Navigate to Virus & threat protection.
- Click on Manage settings underneath, then find Real-time protection.
- Switch it off, and confirm with Yes. Don’t be surprised if your PC warns you — it’s normal during these steps.
Why it helps? Because of course, Windows loves to second-guess your choices. When real-time protection is off, the OS isn’t constantly scanning the huge unpacked files, which might otherwise get blocked or flagged as threats — leading to errors later on.
Start the Installation with Elevated Permissions
Which is just a fancy way of saying “run as administrator”. This fixes permission issues that sometimes cause files not to extract or install properly. Especially relevant for Windows 10/11 setups that sandbox or restrict script executions.
- Right-click the setup.exe or installer file.
- Select Run as administrator.
Doesn’t hurt to do this because it bypasses some Windows restrictions, making the process smoother. On some setups, not doing this causes unexpected errors mid-install.
Configure the Game Folder as an Exclusion in Windows Security
This is one of those “can’t see the forest for the trees” things. The security software keeps mistaking your cracked files for malware, so adding the game folder to the exclusion list is a must. Otherwise, Windows might delete, quarantine, or block files during updates or after some time.
- Open Windows Security as before.
- Scroll down and click on Add or remove exclusions.
- Hit Add an exclusion and select Folder.
- Navigate to your game folder, like
C:\Games\[Game Name], and click Select Folder.
Note: You can find this under Settings > Privacy & Security > Windows Security > Virus & threat protection > Manage settings > Exclusions. Sometimes, this process needs a reboot to fully stick in your system.
Re-enable Real-time Protection After Exclusion Setup
Once the exclusions are in place, don’t forget to turn the shield back on. Leaving real-time protection off too long isn’t ideal, but in this context, it’s necessary to avoid corrupting the installation files or running into false alarms later.
- Go again to Virus & threat protection.
- Toggle Real-time protection back on.
This step is mostly about not making your PC more vulnerable than necessary but being practical during the install process.
Dealing with Setup Errors and Missing DLLs
If errors like ISDone.dll or Unarc.dll keep showing up, it’s often due to corrupt or incomplete files, insufficient disk space, or antivirus interference. Make sure your target disk has at least 50-100 GB free, especially for larger games. Sometimes, running a disk cleanup or defragmentation helps. Also, check the integrity of the downloaded files — redownload if needed.
On some setups, running the installer with compatibility mode or as administrator again might help. And if errors persist, trying a different extraction tool like 7-Zip (instead of Windows’ built-in extraction) could help. Because sometimes, Windows just refuses to cooperate, and you gotta work around it.
Additional tip: Use the Command Line for Troubleshooting
If all else fails, open Command Prompt as admin (Windows key + X and pick Command Prompt (Admin) or Windows Terminal (Admin)) and run commands like:
chkdsk /f /r
sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealthThese commands check your disk and system files for corruption, which can be sneakily causing errors during install or run.
Extra Tips & Common Issues
Other than the usual security dance, make sure your system is updated — Windows updates often fix bugs that cause legitimacy issues during large file operations. Also, turn off any aggressive antivirus that might block or quarantine your game files.
- Keep your graphics drivers up to date with NVIDIA or AMD.
- Run the installer in compatibility mode for Windows 10/11 if it’s an older setup.
- Sometimes, disabling Windows Defender temporarily or adding your game folder as an exception makes all the difference.
Wrap-up
Dealing with these issues can be frustrating, but it’s often just about controlling security and permissions. Since Windows seems to always want to make life more complicated, sometimes a little manual setup is needed. Once everything’s in place, launching the game should go smoothly — fingers crossed.
Summary
- Disable Real-time Protection during install, then add game folder to exclusions.
- Run setup as administrator and consider compatibility mode.
- Check disk space, run disk/system diagnostics if errors persist.
- Re-enable security features after setup is complete.
Additional FAQs
Why do I keep getting DLL errors even after disabling security?
This might be due to corrupted downloads, insufficient disk space, or antivirus interference. Re-downloading the files or running disk cleanup can help. Sometimes, manually placing missing DLLs from trusted sources fixes the issue.
Is this method safe to do on Windows 11?
Generally, yes, but always remember to re-enable security features afterwards — it’s about balancing safety and getting the game running.
Any quick tips for avoiding errors during extraction?
Use a reliable archiver like 7-Zip instead of built-in Windows extraction, keep your Windows updated, and ensure no other programs are locking files during setup.
Hopefully, this makes the install process a lot less frustrating. Because dealing with errors always feels like a game of chance — and here’s hoping this keeps it in your favor.