Alex Ruben
How To Install FitGirl Games on PC: Complete Guide and Troubleshooting Tips (2025)
Installing FitGirl repacks can be a bit of a headache sometimes, especially when you get those dreaded errors like ISDone.dll or Unarc.dll messing up your install. If you’re tired of the endless googling or just want a straightforward process that actually works, this rundown might help. The thing is, sometimes your antivirus or Windows security settings interfere when you’re trying to run or extract those files, or maybe your system just doesn’t want to cooperate. So, the goal here is to cover some common troubleshooting steps — disable protections, fix file blocks, and make sure your system is ready for game installation. Hopefully, after these steps, you’ll get those games installed without the usual fuss.
How to Fix Installation Issues When Installing FitGirl Repack Games
Disable Real-Time Protection Just Long Enough
This is usually the first thing to try because Windows Security tends to block or flag parts of the setup files, especially if they’re coming from shady sources (which, well, they kind of are, but that’s the point). Disabling real-time protection stops Windows from interfering during setup, which often causes errors like ‘corrupted files’ or ‘installation failed’. Just remember to turn it back on afterward. If your antivirus has its own settings, you’ll want to temporarily disable that too.
- Open Start Menu and type
Windows Security. - Go to Virus & Threat Protection.
- Click on Manage Settings.
- Turn off Real-time Protection. You might get a warning, but that’s normal for this step.
Pro tip: sometimes, this step alone can fix weird install errors, because Windows thinks those setup files are malicious. On some setups, it’s weirdly hit-or-miss, so don’t be surprised if it takes a reboot or two to settle.
Restore or Unblock Setup Files if Windows Blocked Them
If Windows Security flagged the setup files as threats, they might get quarantined automatically. That’s why the install won’t work or you get errors like DLL issues. Here’s how to check if that’s the case and undo it.
- In Virus & Threat Protection, scroll down to Protection History.
- Look for blocked files related to your setup—these will often be marked as threats or quarantined.
- Select those files, then click on Restore or Allow. Sometimes, you might need to click this link for more guidance.
- Restart the install process — hopefully, now Windows lets you run the setup cleanly.
Run the Setup as Administrator
That old “run as admin” trick — it’s still a lifesaver. Especially since Windows sometimes screws with permissions and blocks certain actions. Right-click the setup file, select Run as administrator. This often helps if you get DLL errors or install failures related to permissions.
Check Your Hard Drive Space & File Integrity
This seems obvious but… make sure you’ve got enough space on your drive. Repacking is hefty, and running low on storage can cause errors during extraction or installation. Also, verify that your downloaded files are complete and not corrupted. If you suspect corruption, redownload from the source or try on a different machine.
Extra tip: use checksums or hash verification if the files provide them. Because of course, Windows has to make it harder than necessary.
Add Game Folder to Exclusions
Next, prevent Windows from constantly messing with your game files after installation. You want to add your game directory to the exclusion list, so Windows Security skips scanning it forever.
- Navigate to Windows Security > Add or Remove Exclusions.
- Click Add an Exclusion, then choose Folder.
- Pick your game install folder — usually under C:\Games\YourGame or wherever you installed it — and hit Select Folder.
Additional Tips for Troubleshooting
- If you hit an
ISDone.dllerror, it’s often linked to RAM or HDD space issues. Close unnecessary programs, and consider increasing virtual memory. - For errors like
Unarc.dll, double-check if your storage device isn’t having bad sectors or just too full. Sometimes, running a disk cleanup or a disk check helps. - On some machines, the first attempt might fail, but after a reboot or even rerunning the installer with admin privileges, it clears up. Not sure why it works, but it does — go figure.
Wrap-up
Once you’ve followed these steps, your chances of successfully installing FitGirl repacked games should improve a lot. Sometimes the simple stuff — like turning off protections or running as admin — makes the difference. Other times, it’s about keeping your files intact and letting Windows know you’re serious about the install.
Summary
- Disable real-time protection—don’t forget to turn it back on later.
- Check if setup files are blocked and restore them if needed.
- Run the installer with administrator rights.
- Ensure enough disk space and verify your files aren’t corrupt.
- Add your game folder to Windows Security exclusions.
- Close background apps and consider increasing virtual memory if errors persist.
Fingers crossed this helps
Hopefully, these tips speed up the process and save you from pulling your hair out. Sometimes, it’s just about making Windows play nice long enough for the install to finish. Worked for me — hope it works for you, too.