Contextual Menu Problem?


For some strange reason my mouse pointer is stuck on 'contextual menus' and I cannot turn it off ???? I am unable to to just click on an icon to open or run a programme or click on scroll bars to move up and down window lists without the contextual menu option ?? I am guessing some kind of preference file has been corrupted ??? I have deleted and along with a Portfolio file from Library/Contextual Menus Folder then restarted with no resolution to this frustrating problem? Any ideas what might be happening and how to fix the problem will be most welcome.
Thanks. SJAM

800MHz G4 - 1.25GB SDRAM - System OSX 10.3.9 - Apple Pro Mouse.