Unable to send or receive emails

hi i'm desperate for any help on this issue ive run a deep virus scan and found a trojen that seemed to be tied in with my hotmail, i put it into quarantine but i keep on getting this message below

Unable to send or receive messages for the Hotmail.co (sbig) account.

Server Error: 3204
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE20003

Although i can still get through outlook and iphone


can anyone point me in the right direction please, many thanks