Both installers install the same QGIS. The difference is how they install: OSGeo4W is a package manager that handles dependencies; the standalone MSI is a self-contained installer.
Quick recommendation
Which installer should you use?
OSGeo4W is recommended for most Windows users. Use the standalone MSI only if you need offline install, corporate deployment, or a simpler one-click experience.
| Feature | OSGeo4W | Standalone MSI |
|---|---|---|
| Install method | Network installer (downloads packages) | Self-contained offline installer |
| File size | ~1 MB setup + ~1 GB download | ~1 GB single file |
| Offline install | No (needs internet) | Yes |
| Update mechanism | Re-run setup, check for updates | Download and install new MSI |
| Multiple QGIS versions | Yes (LTR + Latest side-by-side) | One version per install path |
| Python/GDAL control | Full control | Bundled versions only |
| Corporate deployment | Complex | Easy (standard MSI) |
| Recommended for | Most users | Offline, enterprise, IT deployment |
OSGeo4W installer
When to choose OSGeo4W
- You have a reliable internet connection during install
- You want both LTR and Latest installed side-by-side
- You need fine-grained control over GDAL, Python or other OSGeo packages
- You want easy updates by re-running the same setup
- You are following official QGIS documentation (which assumes OSGeo4W)
# Run the downloaded setup:
osgeo4w-setup.exe
# Choose: Express Desktop Install
# Select package: qgis-ltr (or qgis for latest)
Standalone MSI
When to choose the standalone installer
- No internet access on the target machine
- IT department requires standard MSI for Group Policy deployment
- Simplest possible install experience (next, next, finish)
- You only need one specific version and do not plan to update frequently
Download the standalone installer from qgis.org/download → choose your OS → Standalone Installer. See standalone installer guide.
FAQ
Installer questions
Is the OSGeo4W version the same QGIS as the MSI?
Yes. Both install the same QGIS application. The difference is only in how dependencies (GDAL, Python, PROJ, GRASS) are packaged and managed. OSGeo4W uses a shared package manager; MSI bundles everything into one installer.
Can I switch from MSI to OSGeo4W?
Yes. Uninstall the MSI version first via Control Panel, then install via OSGeo4W. Your QGIS projects (.qgs/.qgz files) and data are unaffected. You will need to reinstall plugins.
QGIS MSI install for enterprise/silent deployment
The standalone MSI supports silent install:
msiexec /i QGIS-OSGeo4W-3.40.5-1.msi /quiet /norestart. For Group Policy deployment, the MSI works with standard Windows software deployment tools.