You will have to set up your user account from scratch.
You can transfer most settings by unhiding Hidden Files in Control Panel>Folders and copying over the contents of AppData folders to new ones.
Most programs should work fine unless they were only installed for one User, since you'll be Administrator (either hidden or account).
I use webmail so you'll have to test and research more for yourself how to maintain Windows Mail if that is what you have.
Have you considered a clean reinstall which is the ultimate fix for corruption on this scale?
Clean Install Windows 7