There are several ways to debloat Windows 11 and improve its speed performance without using custom modded OS. Here are some recommendations:
1. Uninstall unnecessary built-in apps: Windows 11 comes with many built-in apps that you may not need. You can uninstall them to free up space and resources. Go to Settings > Apps > Apps & features, select the app you want to uninstall, and click on Uninstall.
2. Disable unnecessary startup programs: Some programs automatically start with Windows 11, which can slow down the system. Go to Task Manager > Startup, and disable the programs you don't need.
3. Disable unnecessary services: Windows 11 has many services running in the background that you may not need. Go to Services, identify the services you don't need, right-click on them, and select Properties > Startup type > Disabled.
4. Use a debloating script: There are several debloating scripts available on GitHub that you can use to remove unwanted features, apps, and services from Windows 11. One such script is Debloat Windows 10, which also works on Windows 11.
5. Use a third-party optimization tool: There are several third-party optimization tools available that can help improve Windows 11's performance. One such tool is CCleaner, which can clean up junk files, optimize the registry, and disable unnecessary startup programs and services.
These are some of the ways to debloat Windows 11 and improve its speed performance without using modded custom ISOs. However, it's always advisable to be cautious when using third-party tools and scripts, and make sure to create a system restore point before making any changes.