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