How Do I Prevent the Minecraft Launcher From Overwriting an Old Optifine Installation?

Steven Burnett · Sep 1, 2023

I am playing Minecraft 1.0.0, and I want to install Optifine. I found a legacy download for the 1.0.0 Optifine version, and installed it the way I did when I first played: open the .jar file in an archive editor, open the Optifine zip file, drag contents of Optifine into 1.0.jar, etc. Then, when I ran the game, Optifine was NOT installed. The launcher decided that I didn't know what I was doing and "fixed" the contents of 1.0.jar. All the solutions I found online referred to deleting a section of the 1.0.json file to prevent the game from validating the contents of the client. So, I did that, and lo and behold, the .json was ALSO "fixed" back to default. This is absolutely ridiculous, and after this, as well as the latest "Content Guidelines," there's no way that the game isn't hemorrhaging every pre-2016 player and content creator. There must be some way to install a simple performance mod that has existed since the game was in Alpha.

Also, this is a version that does NOT have an Optifine installer, because the installer wasn't necessary until all the ridiculous "validation" was added to the launchers. If it did, I wouldn't have this problem.

:)

Tomm_A

Hello Steven Burnett,

Greetings!

Thank you for posting in Microsoft Community.

The issue you are describing here is best address to the game developer support to get the best assistance. What we can do is to guide you to the right team which is Minecraft support where you can get the best resolution by submitting a ticket. To do so, follow the steps below:

Go to this link: Contact Us | Minecraft Help
fill out the form by providing the needed information.
Then click Submit.

We are positive that you’ll get more relevant information and best resolution to your concern.

Sincerely,

iTsFx

Hello, I'm Felipe and I'm an independent Community Advisor, and I'll do my best to help you.

After researching the issue, it seems that the Minecraft launcher is designed to check for and apply any available updates each time the launcher is opened. However, there are a couple of potential workarounds that may help:

1. Use the "Play Offline" feature: When the launcher opens, click on the "Play Offline" button in the lower-left corner. This should allow you to bypass the update check and play Minecraft on the last version you played.

2. Use OptiFine: OptiFine is a mod that includes its own Minecraft launcher. By using OptiFine to launch Minecraft, you can avoid the Minecraft launcher altogether and play on the version of Minecraft that OptiFine is currently set to.

I hope this helps! Let me know if you have any further questions or concerns.

XBF John

Hello,

By installer do you mean the Minecraft Launcher is not installing Java? Can you confirm that you are using the new launcher and not the old one? Uninstalling the Old Minecraft Unified Launcher – Home

Thank you,

JohannaApple

Thank you for your response!

I X'd out of my Mojang and Microsoft accounts to delete them from the launcher, and then tried to log in again, and it's still showing that I have an incorrect password.

Do you know if having Optifine installed affected it? It uses the official Mojang launcher, the only difference is that it lets you put what version you want to play, and instead of 1.17, I pressed Optifine 1.17. It wasn't giving me any issues at the time though. This only happened right when I was migrating and now for the 1.18 update.

Do you have any others ideas I could try?

Belle_696

Hello Joshua,

Let me help you with your concern today. Please note that this is a public forum, I will be responding to you in short period of time and I apologize for a delay in response. As I am merely a user trying to provide insight and information that may be helpful.

You seem to be using the Legacy Launcher which is the old version and does not support Minecraft Bedrock. Please try downloading the latest Minecraft Launcher. You can download it from here https://www.xbox.com/games/store/Minecraft-Laun...

If you have the Xbox app installed in your PC, you can also install Minecraft Launcher in there.

After installing the Minecraft Launcher, please try to check if you will have the same issue accessing Minecraft Bedrock. Check if your multiplayer works now too.

For your reference on How to Download and Install the new Minecraft Launcher https://help.minecraft.net/hc/en-us/articles/23...

I hope this helps. Please let me know if you have any more questions or concerns about this.

Regards,

Belle

How Do I Prevent the Minecraft Launcher From Overwriting an Old Optifine Installation?