An email doing the rounds at the moment purports to be from Microsoft, but is in all likelihood a scam email complete with a virus.
The email alleges that you have unread messages in your account and that in order to read them you have to reconfigure Microsoft Outlook by downloading the attached file.
Any file with the extension ‘.exe’ at the end is an executable file. These file types execute a command on your computer and could very well contain trojan viruses that give a remote user access to your files, including stored passwords and other private data.
Never download any attachments in emails unless you’re absolutely sure that they’re safe.