Alex Ruben
How To Avoid Common Mistakes When Installing FitGirl Games in 2025
Introduction
Installing FitGirl repacks can feel kinda rewarding, especially when you finally get it to work. But honestly, it’s easy to run into issues like errors during setup, missing DLLs, or even your antivirus throwing a fit and screwing things up. If you’re tired of spending hours troubleshooting because of small mistakes—like not disabling antivirus or picking the wrong install folder—this guide should help clear that up. By following these steps, you’ll be able to sidestep the most common pitfalls and have your game running smoothly on Windows 10 or 11. The goal? Get that sweet game installed with as little fuss as possible and avoid those annoying error messages like ISDone.dll or unarc.dll not working properly.
How to Avoid Common Installation Nightmares in Windows 11 & 10
Disabling and Re-enabling Your Antivirus — Why it Helps and When
This one’s kind of a must-do because antivirus programs love to get overprotective when a big setup starts. They sometimes block important install files or quarantine stuff, which leads to errors. Turning off real-time protection before installation helps ensure the setup files can do their thing without interruption. On some systems, this even causes the setup to crash or hang if you don’t. After installing, you’ll want to turn it back on, obviously—because Windows has to make it harder than necessary. Expect fewer errors and smoother install times.
- Go to Start menu → type
Windows Securityand open it. - Select Virus & Threat Protection
- Click Manage Settings
- Toggle off Real-time Protection
Pro tip: Sometimes, after a reboot, Windows re-enables real-time protection automatically, so you might need to do this again if errors pop up later.
Set Up Exclusions Correctly in Windows Security — Preventing Installation Conflicts
Once you’ve disabled antivirus, it’s a good idea to tell Windows to ignore your game folder. This helps avoid false positives or accidental quarantine of setup files. Because of course, Windows has to make it more complicated. On some setups, the installer or unpacker (like unarc.dll) throws a fit if it thinks it’s malicious. Adding the folder to exclusions keeps the setup from being blocked mid-install or during unpacking.
- Open Windows Security → Virus & Threat Protection → scroll down and click Add or Remove Exclusions.
- Click Add or Remove Exclusions and select Add an Exclusion.
- Pick Folder.
- Navigate to your installation directory — usually something like
C:\Games\YourGameFolder— and select it. - This rarely fails, but sometimes Windows resets exclusions after updates. Check periodically if errors pop up again.
Installing the Required Software — Because Windows Is Picky
That annoying error about missing DLLs, like ISDone.dll or unarc.dll, often shows up because you’re missing vital system files or components. Installing the correct DirectX, Visual C++ Redistributables, and sometimes the .NET Framework helps a lot. It’s kinda weird—these are small but essential files that most games rely on, especially with repacks. Usually, the setup prompts you to install these, but sometimes you need to do it manually.
- Download the latest Visual C++ Redistributables from Microsoft’s official site and install both x86 and x64 versions (especially if you’re on a 64-bit system).
- Get the latest DirectX from Microsoft’s official DirectX download.
- For .NET Framework, use the official .NET Repair Tool or install the update from Microsoft’s site.
Note: Sometimes these updates won’t show up in Windows Update, so grabbing them from Microsoft manually is a lifesaver.
Extra Tips & Troubleshooting
If things still get weird, here’s a quick list of what else to check:
- Close unnecessary background apps—especially ones like anti-malware scanners or system cleanup tools.
- Make sure Windows is fully up-to-date because some system files might be missing or outdated.
- If errors like ISDone.dll pop up again, consider running
chkdsk /f /rin Command Prompt to fix disk errors orsfc /scannowto repair system files. Those commands fix common Windows issues and can save a lot of headache.
Wrap-up
Following these tips should help dodge a lot of the most common install errors when dealing with FitGirl repacks. Disabling antivirus during install, adding your game folder to exclusions, and making sure all the software prerequisites are there tends to fix 90% of the issues. It’s kinda frustrating how Windows always has a trick or two up its sleeve, but with a little patience, things tend to work out.
Summary
- Turn off real-time protection before installing, then turn it back on afterwards.
- Add the game folder to Windows security exclusions to prevent false alarms.
- Install all necessary system updates, DirectX, VC++ Redistributables, and .NET.
- Run system scans if errors keep popping up —
sfc /scannowandchkdskare your friends. - Keep background applications minimal while installing, especially antivirus programs.
Final Thoughts
If this gets one update moving, mission accomplished. Nothing beats the feeling of finally getting that game to run after messing around for ages. Hopefully this helps save someone a few hours of frustration and keeps the install stress to a minimum. Fingers crossed this helps!