Hi Chris,
Microsoft ditched Outlook Express around about the time Microsoft Vista was out, so given you upgraded from a Windows 7 operating system my best guess is you were using Windows Live Mail which is very similar to Outlook Express.
On Windows 7 and also on Windows 10, the Windows Live Mail are store at the following location:
C:\Users\The Name you log in computer with\AppData\Local\Microsoft\Windows Live Mail
If you open File Explorer, a quick way to get there is to type the following into your File Explorer Address bar:
%localappdata%\Microsoft\Windows Live Mail
Then press Enter key to automatically be taken to the correct location.
Inside the
Windows Live Folder you'll find your Account folder, and inside that your Inbox, Sent, Drafts, Trash etcetera folders, each of which will contain emails you have previously downloaded via the Windows Live Mail application.
Now as I mentioned in my original post to you, its likely that when Windows 10 was installed, your Windows Live Mail being technically a third party application was shifted to the
Windows.old folder. If that is the case using File Explorer you can navigate to:
C:\Windows.old\Users\Regedit32\AppData\Local\Microsoft\Windows Live Mail, replacing
Regedit32 with the Username you log on to your computer as.
You can if you so wish install Windows Live Mail
(*) onto your computer again, then literally
copy & paste the
Account folder & all its subfolders and files from the Windows.old folder to your new installation.
(*) Note: Alas Microsoft ended support for Windows Essentials 2012 back in January this year, so if you need to download this to re-install Windows Live Mail, then you'll have to risk downloading it from a non Microsoft website; so if you do that make sure you check it for bloatware, and virus before running it.
An alternative email client called
eM Client is worth taking a look at. Its quite similar to Windows Live Mail and you can import old emails from Windows Live into it. It's free if you are using it for personal purposes, otherwise for commercial purposes you'd have to pay for it.
It may be time though to bite the bullet per se and learn to use the free built in Windows Mail app.
Regards,
Regedit32