On Monday, Microsoft issued a security warning about attacks where hackers could embed malware in RTF (Rich Text Format) documents. When opening a hacked RTF file, the malware launches. This could allow hackers to take over victims' computers, use victims' computers to send out e-mail spam, or use victims' computers in coordinated botnet attacks.
.To avoid having your computer get infected with malware, don't open any RTF files until Microsoft ways it is okay to do so. Until a permanent fix is available, Microsoft provided this automated tool fix.
It is a good security habit for consumers to never open e-mail attachments from strangers, regardless of the file format. To learn more, read this Reuters news story on Yahoo Finance.