To set the defaults for Internet Explorer, go to Settings > System > Default Apps then scroll down to the bottom to Set Defaults by App. Switch to a different browser (firefox or internet explorer 11) to run the Java plug-in. 'On Windows 10, the Edge browser does not support plug-ins and therefore will not run Java. Alternatively, some reported that turning your JAR file into a BAT file worked perfectly. When JAR files are not opening, another great method is to simply use a universal file opener. If you can't run jar files on your Windows 10 PC, you might need to reinstall Java Runtime Environment.

Open launcher again and try launching the game. Save settings, this will ensure the launcher runs with default runtime it came with. Navigate to Launch Options and find the “Java executable” option and un-check it. Start the launcher, and open up the launcher options. Result: A message similar to the following indicates that Java is installed and you are ready to use MITSIS via the Java Runtime Environment.

Type: java -version and press Enter on your keyboard.

Follow the menu path Start > Programs > Accessories > Command Prompt. When prompted, choose Save in the download dialog box, and save the download package in a convenient place (e.g. Download and install the offline installer package. Once you see the 1603 error, restart your system. Option 1: Restart your system and uninstall old versions

Run java installer as administrator it will, now it should work.

Sign out and log in to the administrator account.

Type this on your console 'net user administrator /active:yes'.

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Restart your browser after installing Java to enable the new version.

Why do I get file corrupt message during Java installation?.Temporarily turn off firewall or antivirus clients.Uninstall any non-working Java installations.Try the offline installer package (Windows only).Do I need to restart after installing Java?.How do I fully complete Java installation?.How do I install Java without admin rights?.How do I fix Java installer not opening?.Press CTRL, ALT and DEL keys simultaneously.You should be able to resolve this issue by doing the following: Error 1618 is a Windows error that happens when another program is already in the process of being installed.

Java error code 1618 fix