Fix FreeCAD Not Opening on Windows

Updated March 2026 · 7 min read

Person troubleshooting a computer error on a desk — fixing FreeCAD startup issues on Windows

FreeCAD not opening on Windows has a handful of known causes. Here are the most common reasons FreeCAD fails to launch and how to fix them — starting with the simplest solutions. Work through them in order. The first three solve the majority of cases.

Fix 1: Re-download the Latest Version

A corrupted download is the most common cause of FreeCAD not opening. Go to our download page, get the fresh installer, and reinstall. Make sure you're using the 64-bit version (x86_64) unless you're on very old hardware. FreeCAD 1.1.3 is the current stable release with the fewest startup issues. Verify the file size matches the listed size on the download page — partial downloads fail silently on some browsers.

Fix 2: Run as Administrator

Right-click the FreeCAD shortcut and choose "Run as administrator." On some Windows configurations, FreeCAD can't write its config files without elevated permissions, which prevents it from starting. If it opens as administrator, the fix is to change the permissions on the FreeCAD config folder in your user AppData directory: right-click %APPDATA%\FreeCAD, Properties, Security, give your user account Full Control.

Fix 3: Delete the FreeCAD Config Folder

A corrupted configuration can stop FreeCAD from starting. Press Win+R, type %APPDATA%\FreeCAD and press Enter. Delete or rename this folder. FreeCAD will recreate it fresh on next launch. You'll lose saved preferences but the app will open. This is the single most common fix for "FreeCAD opens, then immediately closes" — a stale config from a previous version often confuses the new one.

Fix 4: Install Visual C++ Redistributables

FreeCAD requires the Microsoft Visual C++ 2015–2022 Redistributable (x64). If it's missing, FreeCAD will silently fail to open. Download it directly from Microsoft's website — search "Visual C++ Redistributable 2022 x64" and install it, then try launching FreeCAD again. Most modern Windows 11 installs already have this, but Windows 10 systems and freshly imaged laptops sometimes don't.

Fix 5: Check Antivirus / Windows Defender

Some antivirus software quarantines FreeCAD's Python DLLs on first run, preventing startup. Check your antivirus quarantine folder — if FreeCAD files are there, restore them and add FreeCAD's installation folder to the exclusions list. Windows Defender can also block the portable .7z version unless you explicitly allow it via the Protection History panel.

Fix 6: Try the Portable Version

If the installer version won't open, try the portable (.7z) version from our download page. Extract it to a folder on your desktop and run FreeCAD.exe directly. The portable version doesn't touch the registry or system folders, so it bypasses most installer-related issues and works without admin rights — useful on locked-down work computers.

Diagnostic: Run FreeCAD from the command line

When FreeCAD fails silently, the command line is the fastest way to see the actual error message. Open Command Prompt, navigate to the install folder (typically cd "C:\Program Files\FreeCAD 1.0\bin"), and run FreeCAD.exe -t 0. This launches in self-test mode and prints any startup errors directly to the terminal. Copy whatever it says — that error is what you'd post to the FreeCAD forum for help.

Diagnostic: Check the GPU driver

FreeCAD requires OpenGL 2.0 support from your graphics driver. If FreeCAD opens to a black 3D viewport or crashes immediately on the first model load, the driver is the most likely culprit. Update from the Nvidia, AMD, or Intel download page directly — Windows Update ships generic drivers that often lack newer OpenGL features.

Still Not Working?

If none of these fixes work, the FreeCAD forum has a dedicated help section. Post your Windows version, FreeCAD version, the output of FreeCAD.exe -t 0, and any error messages you see. The community is active and responsive — most posts get a useful reply within hours.

See also our FreeCAD on Windows 11 guide for Windows-11-specific issues like SmartScreen prompts, GPU selection on laptops with switchable graphics, and high-DPI display scaling.

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FAQ — FreeCAD Not Opening

Why is FreeCAD not opening on Windows?

The most common causes are a corrupted user configuration, missing Visual C++ Redistributable, antivirus quarantining DLLs, or an outdated GPU driver. Delete %APPDATA%\FreeCAD, reinstall the Visual C++ 2015–2022 x64 Redistributable, and update your graphics driver — these three fixes solve the majority of startup failures.

How do I reset FreeCAD to default settings?

Press Win+R, type %APPDATA%\FreeCAD and press Enter. Delete or rename this folder. FreeCAD recreates a fresh configuration on next launch. You will lose saved preferences but the application will start cleanly.

Does FreeCAD need a graphics driver update?

FreeCAD requires OpenGL 2.0 support. Almost any GPU driver from the past decade satisfies this, but very old or unupdated systems may fail. Update from the Nvidia, AMD, or Intel website rather than relying on Windows Update, which often ships generic drivers without the latest OpenGL features.

Can I run FreeCAD without administrator rights?

Yes — use the portable .7z version. Extract it anywhere in your user folder and run FreeCAD.exe directly. No installer, no registry writes, no admin prompt. Useful on locked-down work computers.

FreeCAD opens, then immediately closes — what fixes it?

Almost always a corrupted user config from a previous install. Delete %APPDATA%\FreeCAD and relaunch. If the problem persists, run FreeCAD.exe from the command line with the -t 0 flag — the error printed will tell you exactly what is failing.

Does FreeCAD work on Windows 7 or 8?

FreeCAD 1.0 officially supports Windows 10 and 11. It may run on Windows 7/8 but is not tested. The Visual C++ 2015–2022 Redistributable is the most likely sticking point on older Windows versions.