What should I do if GeoGebra Classic 5 or 6 won't start or opens off-screen?


First find your GeoGebra folder, which should be here:

  • Classic 5: C:\Users\<username>\AppData\Roaming\GeoGebra 5.0
  • Classic 6: C:\Users\<username>\AppData\Roaming\GeoGebra

Replace <username> with your Windows username. Delete the GeoGebra folder.

Note: The GeoGebra folder can be a hidden folder, so it can be hard to find. One way is to press <Windows> R and then copy and paste this:

  • Classic 5: explorer /n, /e /select, C:\Users\<username>\AppData\Roaming\GeoGebra 5.0
  • Classic 6: explorer /n, /e /select, C:\Users\<username>\AppData\Roaming\GeoGebra then right-click -> Delete


Delete ~/Library/Containers/org.geogebra5.mac/Data/.GeoGebra5.0/prefs/ where ~ stands for your home folder.

What can I do if I get the Java error "Could not create the Java virtual machine"?

There are different possibilities:

  • Follow the steps from above.
  • Reinstall GeoGebra.
  • Try the tips here.

I updated GeoGebra Classic 5, but it keeps reverting to the previous version, what can I do?

Follow the steps from above.

What can I do if I get the error "A Java Exception has occurred"?

Follow the steps from above.

What can I do if 3D View is not working on GeoGebra 6?

Try adding the line app.commandLine.appendSwitch('ignore-qpu-blacklist', 'true'); after the line const {app, BrowserWindow, Menu} = require('electron'); which is around line 24 in resource\app\main.js.

CAS View doesn't work in the portable version, what can I do? (Classic 5 on Windows)

Try to run the portable version as administrator. Right-click on GeoGebra.exe -> Run as Administrator

How can I do a network installation? (Windows)

You can find the information here.

How do I get the macOS version without going through the Mac App Store?

You can use a portable version, which you'll find on our Website.

What should I do if I use OSX 10.6 or 10.7?

Please try the version with Java 7 or upgrade for free to OSX 10.10.

What can I do if GeoGebra Classic 5 doesn't work well on my retina Macbook Pro?

Go to "Program Files" then right-click on "GeoGebra" -> "Info" -> "Open in lower resolution".

What should I do if I want to suppress this message "New version available"? (Windows)

Set this key in the Registry: HKEY_LOCAL_MACHINE/Software/JavaSoft/Prefs/geogebra/version_check_allow = false


Use a command line argument: Command_Line_Arguments

How do I run GeoGebra with more memory allocated?

Use Command_Line_Arguments.

How can I clear the Java Cache?

Follow these steps:

Java Control Panel -> General -> Temporary Internet Files -> Settings -> Delete files ...

To get the Java Control Panel in Windows 7/8/8.1/10, open "Control Panel" then type "Java" in the search box (top right).

How can I clear the Browser Cache?

Chrome: Options -> Settings -> Show Advanced Settings -> Privacy -> Clear Browsing Data

Firefox: Options -> Settings -> Privacy -> Clear Recent History

Safari: Preferences -> Privacy -> Remove All Website Data

Internet Explorer: Internet Options -> General -> Delete

Other browsers: How do I clear my cache?

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