Alex Ruben
How To Install FitGirl Repack Games Seamlessly in 2025
If you’ve played around with FitGirl Repack games before, you probably know that their installation process can be… a little spicy. Errors like ISDone.dll or Unarc.dll popping up out of nowhere are common enough to drive anyone mad. Sometimes these pop-ups happen because your security settings interfere or Windows just has a funny way of blocking certain files during setup. The idea here is to get the game installed smoothly, without having to fiddle with stuff repeatedly. It’ll help a lot if you get your system ready, disable unnecessary protections, and make sure Windows isn’t getting in the way. By the end of this, you’ll hopefully have a game up and running without tearing your hair out.
How to Fix Common Errors When Installing FitGirl Repack Games
Disabling Windows Security Real-time Protection to Avoid Interference
This step is kinda crucial because Windows Security’s real-time scanning can sometimes block or quarantine parts of the setup files, leading to errors. On some setups, it’s weirdly aggressive, and on others, it doesn’t do anything. Turning it off temporarily helps prevent that. Here’s how to turn off real-time protection:
- Open the Start Menu and type
Windows Security. - Click on Windows Security to open it, then go to Virus & Threat Protection.
- Scroll down and click on Manage Settings (it’s under the “Virus & Threat Protection Settings”).
- Toggle off Real-time Protection. You’ll get a prompt asking if you want to allow the change—say Yes.
Note: Make sure you turn this back on after installing — Windows is kinda weird that way. Some people do, some forget. Be careful, because leaving it off can leave your system vulnerable if you’re not careful.
Preparing Your System & Downloading the Game
Before even launching the setup, double-check that you’ve got enough free space (at least 50GB is safest), and your RAM is decent enough—8GB or more is usually good. The game files are hefty, and low RAM can cause issues during the unpacking process. Download from a reliable source, and keep your connection steady. Make sure no other heavy programs are running, or they might slow down the setup or cause errors.
Running the Setup File Correctly
When you finally get the setup file, run it as administrator. This sometimes helps bypass permission issues. Right-click on the setup and select Run as administrator. During the initial prompts:
- Click Yes if a User Account Control dialog pops up.
- Select your language and hit OK.
If you encounter permission errors here, try running the installer in compatibility mode for Windows 10 or 11 — right-click, choose Properties, then go to the Compatibility tab.
Managing Installation Settings for Lower RAM PCs
If the PC has less than 8GB RAM, the installer might struggle or crash. Some setups offer an option to limit RAM usage—check that box and set it to 2GB. It’s not guaranteed, but it’s worth a shot. Also, close other programs to free up resources. Sometimes, just having a bunch of background apps running can cause issues during large unpacking or copying stages.
Choosing the Right Installation Folder
Pick a fast drive, preferably an SSD if you have one. Don’t install on a drive with plenty of space but slow access. For example, your C:\Games folder is fine, but avoid installing directly onto a secondary HDD if it’s really slow. When selecting the location, ensure the path is short and doesn’t contain spaces or weird characters.
Completing the Installation & Turning Off Antivirus Temporarily
Once it’s done copying files, uncheck any options to launch immediately. After that, navigate to your Game Folder and add it to Windows Security exemptions—this step keeps Windows from pickpocketing files or causing read errors later. To do this:
- Open Windows Security again.
- Click on Add or Remove Exclusions. You might need to scroll down.
- Select Add an Exclusion then choose Folder.
- Navigate to your game folder (like
C:\Games\YourGame) and select it. - Click Select Folder.
Don’t forget to turn your antivirus back on afterward! The last thing you want is to leave your system unprotected all day.
Re-enabling Real-time Protection & Common Troubleshooting
After setting exclusions, turn real-time scanning back on. If errors keep happening, check your system’s storage space, verify game files aren’t corrupted, and ensure your OS is fully updated. Sometimes, reinstalling Visual C++ Redistributables or DirectX helps if the game complains about missing DLLs during launch.
On some setups, the installer might still fail the first run but work fine after a restart. That’s kind of weird but happens enough to mention. Basically, after changes, rebooting often fixes lingering issues.
Extra Tips & Common Problems
Things that tend to trip people:
- Insufficient disk space or fragmented drives.
- Corrupted ISO or compressed files—check the source.
- Antivirus still blocking files even after you disable it temporarily.
- Running the installer with inadequate permissions or on incompatible Windows versions.
Wrap-up
If this process is followed, chances are pretty good that errors like ISDone.dll or Unarc.dll will be much less frequent or just disappear entirely. It’s a mixture of system prep, quick security tweaks, and kinda paying attention to what Windows is doing behind the scenes. Honestly, on some machines, this kind of careful setup becomes necessary—Windows just loves to interfere when you’re trying to blow through a big install. But once it’s done right, those games will finally run, and you get to enjoy the fruits of your labor without throwing your keyboard out the window.
Summary
- Disable Windows Security real-time protection temporarily.
- Ensure enough drive space and close background apps.
- Run the installer as administrator and in compatibility mode if needed.
- Limit RAM usage during install if on a low-RAM PC.
- Add the game folder to Windows Security exclusions.
- Re-enable security protections after setup.