Problems with signing into my microsoft account account and Email

My other microsoft account is linked to my xbox console. I couldn't sign in, so i followed the advice of posters on this forum and used the sign in helper. This allowed me to change my password, but then i couldn't access my console. I went through the sign in helper on my console and managed to get access to my xbox by changing the password for the account. I am using the correct password but my microsoft account won't accept it. I have only ever used 3 passwords on my microsoft account and none of them work. My account says my password is incorrect or just ignores the password altogether and puts me back to the enter your password screen. I seem to be going round in circles. I also seem to be getting random zeros automatically added to whatever i type into my browser and if i press my right arrow button a snipping tool display appears at the top of the screen. All these faults seem to coincide with each other.