Now click Save and you are ready to play Minecraft with OptiFine.The numbers around the version may differ, but it saves OptiFine and the version of Minecraft you installed OptiFine for on it. Name this Optifine, and click the version drop-down box. A window will appear where you can create a new Minecraft installation. Open the Minecraft Launcher, and click Installations at the top.How to Add an OptiFine Installation to the Minecraft Launcher Else, you can Disable your Antivirus software. If your java is working fine yet you are unable to open Optifine Installer and none of the above methods are fixing the Optifine Installation error then it might be the case that your antivirus software is identifying Optfine as a threat.Ĭheck the antivirus software and if it has blocked Optifine from your device, give it access manually. jar association with javaw.exe.įix 5: Unblock Optifine from Antivirus/ Disable Antivirus Software Go to Jarfix 3.0.0 and follow the guide to download and use the jarfix.exe program.Uninstall Java and then Download the latest Java version and install it.To solve this problem, you can use the following methods: jar file type, because a jar is stored in the. However, many zip/unzip programs steal the. jar files are assigned to javaw.exe, which is the appropriate program to execute a. Now type cd + file path to open the folder where the OptiFine is stored.Press the Windows key + R and type cmd in that box.You can also use the command to run the Optifine installer file. Choose Open with and select Java (TM) Platform SE binary.If you are still failing to open OptiFine Installer try using other methods to open the OptiFine Installer file, for example: Click Install to start the installation process. Close the Minecraft Launcher before installing OptiFine.Launch the Minecraft version you want to install Optifine for on Minecraft Launcher at least once.

Install Java and the latest version of Minecraft.Perform Correct OptiFine Installation Process In addition, the OptiFine file should be a. Download Correct OptiFineĭownload the OptiFine file from as this is a safer and more reliable source than the files downloaded from other sites. How to Fix Optifine Installer Can’t Open Problem?įollow the below-mentioned fixes to solve your issue. To resolve this issue you can follow the following efficient methods. A special file opening method is required.This Optifine can’t open problem occur due to the following reasons: Once users install Optifine on their PC they can’t open or find it on the Minecraft Launcher.

Can't open minecraft with jar launcher