although f secure is working it wont open
Sorry for my reply. I'm also only F-Secure user (their home solutions).
Maybe it is good to add more information about your situation. For example:
-- what is F-Secure solution (F-Secure AV/IS/SAFE ; F-Secure KEY ; F-Secure Freedome; or something else);
-- what is OS/platform (Windows, mobile platform or something else);
-- how did you try to open it? And does it possible to re-check potential other steps to open?
In addition, does it recent trouble and all was OK before? If yes - does there are some changes with system/device?