I've purchased 365 Personal for a new laptop, yet it won't change to the updated version from the 2024 from the old unit

On the new laptop, the Microsoft 365 Personal subscription does not automatically replace an existing Office 2024 (one-time purchase) installation. Office 2024 and Microsoft 365 are different products and can coexist; the apps will keep using whichever license is currently applied.

Use these steps to move to Microsoft 365 Personal on the new laptop:

1. If the new laptop currently has a one-time purchase Office (such as Office 2024) installed and it is still using that license, uninstall it if the goal is to use only Microsoft 365:
   • On Windows, use the Office uninstall troubleshooter to remove the existing Office installation, then restart the PC.
   • Follow the guidance in Can’t switch from Microsoft 365 to Office (the same tool is used to remove existing Office versions).
2. Install Microsoft 365 Personal on the new laptop:
   • Sign in with the Microsoft account that has the Microsoft 365 Personal subscription.
   • Follow the steps in Download and install or reinstall Microsoft 365 or Office 2024 on a PC or Mac to install the Microsoft 365 apps.
3. After installation, the apps will automatically use the Microsoft 365 Personal subscription license. Updates and new features will come through the normal Office update mechanism.

If the old unit had a one-time purchase Office 2024 license, that license does not “upgrade” to Microsoft 365; instead, Microsoft 365 is a separate subscription that must be installed and activated as above.

References:

• Can’t switch from Microsoft 365 to Office
• How do I upgrade Office?
• I have a subscription to Office 365 and want to install it on my new laptop - Microsoft Q&A
• move microsoft 360 to new computer - Microsoft Q&A