I have two Outlook.com accounts, they differ before the @ sign.
The first one is an old one, created a long time ago when still reading hotmail.
Now it is also reading outlook.com

As it serves no purpose to keep 2 accounts and may possibly lead to confusion
I am considering to have the old one deleted. If at all possible... that is.

There are two questions:
1. Can it be done?
2. What to watch out for?
(Example: the username under C:\Users\<UserName> is the same as the name of the 1st (old)
outlook-account, i.e. UserName-at-Outlook.com. If that account is being removed, then what effect will
it have on all the stuff on the C-drive? Maybe it is so tied up to the email username that things are going wrong)