Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
You can refer to AI's recommendations first regarding the Windows edition, as that can affect the available account options on the device. That said, there may be some confusion between a Windows sign-in account and a Microsoft 365 Business account.
Purchasing Microsoft 365 Business does not automatically convert a PC from a personal setup to a business-managed setup, nor does it require you to replace your personal Microsoft account as the Windows sign-in account. Microsoft distinguishes between personal Microsoft accounts and work or school accounts, and many users continue signing in to Windows with a personal Microsoft account while using their Microsoft 365 Business account for Outlook, Teams, OneDrive, and Microsoft 365 apps.
Microsoft also provides a method to add a work or school account to an existing Windows device through Settings > Accounts > Access work or school, without necessarily changing the current Windows sign-in account.
Based on the information provided so far, I would not recommend changing the Windows sign-in account or resetting the PC. Instead, first verify whether the Microsoft 365 Business account is working correctly and determine the exact requirement that is preventing Smokeball from being installed. At the moment, it is not entirely clear whether the issue is related to the Windows sign-in account, the Microsoft 365 Business account configuration, or a specific requirement of the Smokeball application itself.
For more information, you can refer to:
What's the difference between a Microsoft account and a work or school account? | Microsoft Support
Add Your Work or School Account to a Windows Device | Microsoft Support
The exact error message or a screenshot (with personal information removed) can help determine whether the issue is related to the Windows sign-in account, the Microsoft 365 Business setup, or a requirement specific to Smokeball.
I hope this information helps and look forward to your response.