Some laptops come with an OEM license key for Windows 10 Home embedded in their BIOS/UEFI.
When you try to reinstall Windows, the setup will automatically pick Home and won’t let you choose other editions such as Pro.

This guide shows you how to bypass that auto-selection and install Windows 10 Pro instead, without needing a valid Pro license upfront.
⚠️ Note: You’ll still need a genuine Pro key later if you want to activate Windows.

• A Windows 10 ISO (you can get a legit one from Microsoft directly).
• A USB installer (created with Rufus or Microsoft’s Media Creation Tool).
• Basic file editing skills (Notepad will do).

1. On your bootable USB, go to the sources folder.

2. Create a text file named ei.cfg.

3. Paste the following:

   [EditionID]
   Professional
   [Channel]
   Retail
   [VL]
   0

   # Save as 'Optimize-Windows.ps1' and run:
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
.\Optimize-Windows.ps1