W97M/Walker.L is an encrypted class infector that infects the global
template when an infected document is opened. After the global
template has been infected, the virus infects all documents that are
opened or closed.
The virus also lowers the security settings of Word 2000, and disables
all selections from the "Tools/Macro" menu.
It uses the following string to determine if the document is already
[Analysis: Katrin Tocheva and Sami Rautiainen, F-Secure]