PP97M ("PpowerPoint 97 Macro") is a family name for PowerPoint Macro viruses. For example, if you're looking for the description of "PP97M/Attach", "PP/Attach" or "PowerPoint/Attach" virus, see the description of "Attach".
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More information on 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.