My portal version is:
Portal 6.0.11.0.0
KnowledgeManagementCollaboration 6.0.11.3.0
(NW04 SPS 11 Patch 3)
When accessing a link for ppt file I get a web page of
The page cannot be displayed
On windows 2000 it works ok, but when using windows xp sp1 or 2 this occurs.