WM/Swlabs is a very simple Word macro virus.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
When an infected document is opened, the virus infects the global template. After that it infects all opened documents.
Beside replication, the virus will remove "File/Templates" and "Tools/Macros" menu selections.
This variant changes the subject of the document to:
Green Bay Packers -- Super Bowl XXXI Champions
Additionally it infects all documents that are created and saved documents as well.
This variant doesn't do anything beside replicate.