I received some images via email attachments. It has included a file called readme.eml. I downloaded the attachment and opened it. Nothing came up on the screen. Now when I try to download the file it is not deleting. I says the file is busy or being used. I think this is a virus. How to remove it. The same is not detected by my antivirus also. I access my mails by Outlook. How to get rid of this file.