Users will also be able to view Microsoft Word, Excel and PowerPoint documents as attachments to their messages, without having to download or pay for the software.

用户还能够浏览消息附件中的Word、Excel和PowerPoint文档，而不用下载它们或为这些软件付钱。

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At that point, the virus installs a program that renders the computer unable to launch any "executable" applications, such as Microsoft Word and Microsoft Excel.

CNN: 'Navidad' computer virus poses moderate risk

For instance, four years ago Google launched online knockoffs of Microsoft Word and Excel (albeit with less functionality), with no response from Microsoft to protect those franchises.

FORBES: Magazine Article

Google ( GOOG - news - people ) launched online knockoffs of Microsoft Word and Excel (albeit with less functionality), with no response from Microsoft to protect those franchises.

FORBES: OutFront