Microsoft’s plan to “sandbox” Office documents in the next version of its application suite is an admission that the company can’t keep hackers from exploiting file format bugs, a security analyst ...

Opening Microsoft Office documents from unknown sources can present a security risk because such files can carry viruses. To protect yourself and your computer from malware and other threats, ...

Spreadsheets that contain complicated formulas and a lot of data can take a while to load when you open them in Excel 2007, but that's not the only reason spreadsheets can be slow to load. Microsoft ...