Something happened and we couldn't start the upgrade to Windows Pro

Different versions of Windows 11 and Windows 10 are priced differently. The Windows 11/10 Pro version is considerably more expensive than the Windows 10 Home version. Thankfully, Microsoft allows its users to upgrade from Windows 11/10 Home to Windows 11/10 Pro for a reasonable cost, rather than buying the whole license again.

Something happened and we couldn’t start the upgrade

However, users have reportedly encountered the error while trying to upgrade Windows 11/10 through the Microsoft Store. Something happened, and we couldn’t start the upgrade. Problems with the Microsoft Store or key authorization cause the issue. Try the following solutions sequentially to troubleshoot the problem:

Run the Microsoft Accounts Troubleshooter
Run the Windows Update Troubleshooter
Run the Windows Store Apps troubleshooter
Reset the Windows Store cache
Re-register the Windows Store app
Contact Microsoft support.

1] Run the Microsoft Accounts Troubleshooter

Run the Microsoft Accounts Troubleshooter and see if this helps.

2] Run the Windows Update Troubleshooter

Run the Windows Update Troubleshooter and see if that works for you.

3] Run the Windows Store Apps troubleshooter

The Windows Store Apps Troubleshooter is an excellent tool for scanning problems related to the Windows Store on your Windows 10 system and resolving them. The procedure to run the Windows Store apps troubleshooter is as follows:

Click on the Start button and then go to Settings > Updates and Security > Troubleshoot.

Find the Windows Store Apps troubleshooter from the list and run it.

Restart the computer and check if you can upgrade the version of Windows 11/10 now.

4] Reset the Windows Store cache

One of the major reasons behind problems with the Windows Store is a corrupt Windows Store cache. In such a situation, we can clear or reset the Windows Store cache to resolve the problem.

5] Re-install/re-register the Windows Store app

If the above-mentioned solutions didn’t work, you could consider re-installing the Windows Store app. Since the app is an in-built one, you cannot uninstall it like normal third-party programs. The process would require the use of Powershell commands.

6] Contact Microsoft support

Since you have purchased the key for Windows 11/10 Pro version, you are eligible for the upgrade and support for it. Once we have isolated all causes with the Microsoft Store app, the only problem could be with the key. To resolve the same, you could contact Microsoft support.

I hope something helps!