Have problem with installing Windows live mail. Got catastrophic error 0x80000ffff. I tried to windows live mail I could not, I tried Windows essential and have the same problem. I was having problem original with missing dll file:  wlmcore.dll  and it is worst and I am not getting any result.

All these problem started after installing Windows 10. It has been over a month and I don't have a way of going back to windows 7 with my files and applications prior to upgrade to windows 10 intact.