Now then one for the experts!

2 identical Windows 7 laptops updated within 24hrs of each other.
1) Shows the new Windows logo on start up going through to log on (my hotmail account/password)
2) Still showing Windows 7 logo/original log onto machine, then Windows 10 apps as per normal.
Both machines respond identical once started up, with the exception that desktop image in 2) is still the old backdrop.
[Machine 2) has had a Windows 10 uninstall/reinstall but no changes noted!]
Brian