Password no more accepted

I have a RPI, and the password (which I never change) is no longer accepted from SSH (LAN/WAN), FTP (LAN/WAN), terminal itself.
Media stuff still works, web server too.
It seems password changed, even if it’s impossible…

Tried to Google my problem, but I didn’t found anything.
I would really approciate any kind of help, THANKS!!

Edit~ Samba network link on my Win7 still works, but I don’t know if it check for credentials every time (I suppose it does)

Edit~ Never set password to root

A post was merged into an existing topic: Unable to login after latest update