I can't open .jar install file

i'm sorry third-party mods have to be supported by their creators.

Hello Matias S, I am an independent advisor and I will be happy to help you today. My name is Khaji

I understand your frustration. Here are some solutions that might help fix the problem with installing Forge for Minecraft:

Reinstall Java: Often corruption or problems with the application can lead to problems, and reinstalling is the only viable solution.

Press Windows + R to open the Run command, type appwiz.cpl in the text field and click OK

Change the default app for .jar files to Java: Go to Settings > Apps > Default apps > Choose default apps by file type. Scroll down and search for .jar. Change the application for the .jar file to Java

Run the .jar file from the command line: Hold down the shift key and right-click on an empty space in the folder where the installer is located. Select “Open PowerShell window here” and then try running the file with the command java -jar <file name="">

Rename the Forge installation file: Go to the Downloads folder and locate the Minecraft Forge installation file. Then, rename the forge-installer. JAR file to forge. JAR

Thank you very much for your patience and understanding! If you need anything else, do not hesitate to contact us again.</file>

Ah, okay.

Thank you for the help.

It seems to be a common problem with JAR Files not opening, I made a Batch File to fix it.

Kind regards,

Michael.

Hi Josef,

I followed the steps you gave me and it seemed to have gotten rid of the java runtime error however I am now encountering numerous errors such as;

Failed to download file.
Name: fastutil-8.5.6.jar
URL: https://libraries.minecraft.net/it/unimi/dsi/fastutil/8.5.6/fastutil-8.5.6.jar
Filename on disk: fastutil-8.5.6.jar
Path: C:\Users\zacte\AppData\Roaming\.minecraft\libraries\it\unimi\dsi\fastutil\8.5.6\fastutil-8.5.6.jar
Exists: Nonexistent

and

Failed to download file.
Name: jna-platform-5.10.0.jar
URL: https://libraries.minecraft.net/net/java/dev/jna/jna-platform/5.10.0/jna-platform-5.10.0.jar
Filename on disk: jna-platform-5.10.0.jar
Path: C:\Users\zacte\AppData\Roaming\.minecraft\libraries\net\java\dev\jna\jna-platform\5.10.0\jna-platform-5.10.0.jar
Exists: Nonexistent

Me again. Just updating that I have managed to recover my Worlds.

For some reason, I had to now move them to the Mod Folder, and now they work.

The only thing stopping me from playing them, is Java. I have the right JAR Files. But it doesn't want to open them with Java.