Getting Rid of Unread Email Messages
To remove the Unread Email message by user's login names:
Start Regedit
For a single user: Go to HKEY_CURRENT_USER\Software\m*cro$oft\Windows\Curre ntVersion\UnreadMail
For all users: Go to HKEY_LOCAL_MACHINE\SOFTWARE\m*cro$oft\Windows\Curr entVersion\UnreadMail
Create a DWORD key called MessageExpiryDays
Give it a value of 0