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---
title: DumbVersion Patches
description: How to use DumbVersion patch files (.dvp) to generate ISOs.
---
We use **DumbVersion Patch files (`.dvp`)** to efficiently store different localizations and variations of existing ISOs.
These files contain only the exact differences between a base ISO and your target ISO. This helps us with hosting a large amount of ISOs efficiently, without having issues with speed or reliability.
## Prerequisites
Before you begin, make sure you have the following:
* **The latest version of the [DumbVersion Patcher](https://github.com/thecatontheceiling/DumbVersion/releases/):** Download the latest release that matches your operating system and architecture (Windows, MacOS, or Linux and x64 or ARM64).
* **A base ISO:** This is the source file the patch will be applied to.
* **A patch file:** The `.dvp` file you downloaded from our website.
:::info
For most patches on our site, the required base ISO is the standard **English (`en-us`)** version. The Patcher will tell you if you use an incorrect base ISO.
:::
## How to Apply a Patch
1. Create a new, empty folder and place all of the downloaded files inside it: the Patcher executable, any amount of base ISOs, and any amount of `.dvp` files.
2. Execute the DumbVersion Patcher. It will scan the folder and automatically detect both the ISOs and the patch files.
*(If you placed multiple ISOs or patch files in the folder, the tool will pause and ask you to select which ones to use.)*
3. Wait for the Patcher to complete. The Patcher will process the files and generate new ISOs in the same folder.
:::tip
Your original base ISO is strictly read-only during this process. It will **not** be modified, overwritten, or deleted.
:::
## Video Tutorial
import ReactPlayer from 'react-player'
<ReactPlayer controls width='100%' height='auto' src='/dumbversion_tutorial.mp4' />
## Need help?
* Double-check that your base ISO is fully downloaded, uncorrupted, and matches the exact version expected by the patch (usually the `en-us` ISO).
* If you're still having issues, feel free to [contact us](contactus.md).
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