I've been using windows live mail for accesing my accounts in my PC (WIN 7) and my Laptop (WIN XP)

I configure my WLM for accesing several hotmail. gmail and yahoo accounts and always worked fine until yesterday in both my PC and Laptop. 

Since yesterday 09-18-2013 WLM still works fine with all of the others accounts (some of them are hotmail account)  except for one of hotmail.com account. I have not changed anything and WLM always asks for a password authentification in spite of the fact that the password is set up. I can access that  hotmail account from internet and everything looks fine ( i.e. my password is correctly set up).

Apparently the problem is that hotmail.com does not authenticate the passwork of that especific account when trying to accees from WLM since yesterday.

Thanks for any help