An email offering a beta of Office 2010 actually delivers malware.

"To save the users’ time and get them down to this ardent matter as soon as possible, the promised beta version is attached to the message as a zip file," writes Help Net Security's Sabina Datcu.

"However, a detailed file check exposes the fake beta as malware," Datcu writes. "Identified by BitDefender as Trojan.Downloader.Delf.RUJ, this piece of malware affects the Windows platform. It is designed to infiltrate the user’s computer and open a conduit by which large amounts of adware and spyware can be piped into the affected system, therefore generating loads of popup adverts."

Click here to read the Help Net Security article.