Note: Only for windows. If you are on Mac, good luck. If you are on linux, you probably know how to get java

Find out if you need 32bit (x86) or 64bit(x64)

1. press win+R (small dialog pops up)
2. type cmd
3. enter (black window opens)
4. in the window, type “wmic os get osarchitecture” without brackets
5. enter
6. output should look like this:

output will tell you if you need 64 or 32 bit java version + worldpainter version
If you are on win11, type this into the console instead (all one line):

Get-CimInstance Win32_OperatingSystem | Select-Object OSArchitecture

Find out which java version you have installed

1. press win+R (small dialog pops up)
2. type cmd
3. enter (black window opens)
4. in the window, type “java –version” without brackets
5. enter
6. output should look like this:

I have java but its not 17 or 21, but an older version, probably java 8

This official windows tutorial shows you how to uninstall a program.
Search for “java” and uninstall any java that is not say 17 or 21.

Download and install the correct java installer and worldpainter installer

1. Go to this website: https://www.worldpainter.net/
2. Find the downloader for java AND for worldpainter for windows that matches your version: 64 or 32 bit
3. Download java installer
4. Download worldpainter installer
5. Double click the java installer and install java
6. Restart your computer after java finished
7. Install worldpainter, it should automatically find java

if any of the above steps dont work as expected, make a post in #help-and-troubleshooting
please include screenshots of all steps.
if you do not include screenshots, we can not help you