Did'nt help.
The problem may be not with windows mail but something to do with my hotmail account.
I can access it through web browser but neither through my phone nor through win mail on my laptop.
When synchronising, it never connects to my mail hotmail mail 1 though it connects to hotmail mail 2.
The error msg :
Unable to send or receive messages for the Hotmail (xxxxxxx1) account
Server Error: 0x80072F78
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x80072F78