Can I upgrade to Windows 11 Pro from Windows 10 Home without reinstalling?

Download Windows 11 ISO Pro ISO and mount the Windows 11 Pro ISO file as a virtual drive. Then run the setup.exe file from within your current Windows 10 Home environment. This triggers the same upgrade installer as the Assistant but gives you more control if you plan to upgrade to Windows 11 Pro from Windows 10 Home without reinstalling.

Step 1: Right-click the downloaded ISO file and select "Mount". This will create a new virtual DVD drive in "This PC".

Step 2: Open the newly mounted drive and run the setup.exe file.

Step 3: When the installer opens, it's crucial to deselect the option to download updates initially (you can do them later). This avoids a common compatibility check error during edition upgrades.

Step 4: Accept the license terms. On the "Choose what to keep" screen, you must select either:

• Keep personal files and apps (Recommended)
• Keep personal files only

Step 5: The installer will now proceed. It will copy files, install features, and restart your PC.

Step 6: During one of the first reboots, you will see a screen asking you to "Choose an operating system". You must select "Windows 11 Pro" to continue the upgrade to Pro. If you don't see this, the installer might default to Home. This is why having the Pro key entered first (Solution 1 or 2) is more reliable.

Step 6: After the final restart, you will have Windows 11 Pro.

This is the  strongest recommendation for upgrading Windows 10 Home to Windows 11 Pro without reinstalling. It is the method Microsoft intends for users to change their edition and is the least likely to encounter issues.