Alex Ruben
How To Properly Install FitGirl Repack Setup in 2025
Getting these FitGirl Repack games to install properly on Windows isn’t always straightforward. Sometimes, you run into errors like ISDone.dll or Unarc.dll, which can really mess things up and make the process feel like chasing ghosts. This guide is meant to walk through some practical steps that helped get past some of these common hurdles, so you don’t end up pulling your hair out. Basically, by following these, you should be able to install the game without constant fuss and get to playing faster.
Prerequisites
First off, make sure you’ve got your stuff together before diving in. A decent enough disk space, administrative rights (because Windows likes to block stuff), and having your game files ready. Oh, and temporarily disabling your antivirus can save a lot of headaches—Windows Security can be overly eager to flag game setup files as threats, which is kind of annoying.
Step 1: Disable Windows Security Features
To prevent Windows Defender from blocking any part of the installer or extraction process, you should turn off real-time protection at least temporarily. This can help avoid errors that pop up because Windows decided your setup file is suspicious. Here’s how you do it:
- Open the Start Menu.
- Type
Windows Securityand hit Enter. - Click on Virus & Threat Protection.
- Click on Manage Settings.
- Toggle the Real-time protection switch to Off. Confirm if prompted by clicking Yes.
Note: On some setups, this toggle might temporarily disable itself after a restart or certain updates, so if things still fail, re-disable it. Just be sure to re-enable real-time protection afterward to keep your PC safe.
Step 2: Start the Installation Process
Now that Windows Security isn’t bothering you, locate the setup file—typically named something like Setup.exe—and double-click. Sometimes, Windows asks for confirmation via UAC (User Account Control), so make sure to click Yes. Pick your language and hit OK or Next. Doing it this way helps avoid errors caused by Windows blocking parts of the installer.
Step 3: Configure Installation Settings Carefully
This part’s about making sure your game doesn’t run into issues later. If your GPU has less than 8GB RAM, there might be some tweaks needed, like checking options for lower GPU memory consumption. Keep no other heavy apps running—because resource clashes can cause errors during extraction or installation. When choosing the install directory, pick a simple location, like C:\Games\YourGameName. Avoid ridiculously long or nested paths—Windows sometimes doesn’t like those.
Also, besides the default options, uncheck unnecessary language packs unless you actually speak those languages. And if prompted about updating DirectX or Visual C++ redistributables, agree—they’re critical for smooth game operation. Sometimes, the installer even offers to do that automatically, so take it.
Step 4: Finish the Installation
Once setup is done, you’ll probably see a prompt to run the game immediately—just uncheck that box if you want. Click Finish. Some users report that the game might not launch right away after install, so waiting a few seconds or restarting your PC sometimes helps. Also, double-check that the game files are in the folder you selected earlier; on one setup it worked for someone, on another… not so much, so it’s worth confirming.
Step 5: Add an Exclusion to Windows Security
Because Windows Security is overly cautious by default, it might flag game files later, causing crashes or won’t-launch issues. To prevent that, add the game folder as an exclusion:
- Open Windows Security again.
- Scroll down and click on Add or remove exclusions.
- Confirm any prompts with Yes.
- Click on Add an exclusion → Folder.
- Navigate to your game install folder, like
C:\Games\YourGameFolder, and select it.
This tricks Windows Security into leaving your game files alone—sometimes, that’s all you need.
Step 6: Re-enable Real-Time Protection
Once your exclusions are set, don’t forget to turn real-time protection back on. Better safe than sorry:
- Go back into Virus & Threat Protection.
- Toggle Real-time protection back to On.
Because of course, Windows has to make everything more complicated than it should be, but at least this way, your game is less likely to be interfered with later.
Step 7: Launch the Game
Finally, find the shortcut and double-click. If everything’s done right, the game should start without you messing around with permissions or error messages. Sometimes, you might need to run the game as administrator—right-click the shortcut and select Run as administrator. Seen it work on some PCs, not on others, but worth a shot.
Extra Tips & Common Issues
Some extra stuff that might help:
- Always get the latest version of the game files from trusted sources — older files are more prone to errors.
- If you see errors saying “unable to execute file,” it’s probably antivirus interference; double-check your exclusions or temporarily disable antivirus again.
- For missing files or corrupted unpacking, re-extract the archive, and ensure your disk isn’t nearly full or fragmented.
Wrap-up
These steps aren’t perfect, but they’ve saved a lot of headaches for people trying to get these games set up without constant crashes or errors. The key is basically turning off Windows Security temporarily, then making sure everything’s excluded properly, and re-enabling protections afterward. It feels like a hassle, but honestly, it’s the best shot at a smooth install.
Frequently Asked Questions
What if the installation still fails even after disabling protections?
Check the game’s file integrity—sometimes, a corrupted archive or an incomplete download is the culprit. Also, try running the installer in compatibility mode or as administrator—Windows sometimes plays hard to get.
How do I verify that the game installed correctly?
Launch the game via the desktop shortcut or from its folder. If it opens up without errors and runs normally, installation’s good. If not, re-check your exclusions and antivirus settings.
Is it safe to keep exclusions on long-term?
Not really. It’s best to remove the exclusions once you’ve confirmed the game runs fine and everything is stable. Otherwise, your antivirus will be less vigilant about real threats.