My OS is Windows XP running on an HP Pavilion452 Desktop (uk) and when I try to access the HP Help file I get the message [marscore.dll not found]. I have tried Hewlet Packard as well as every Fourim I am regestered with but without any success. The nearest I have got is that it is part of the shell for Windows 2000 help file but I cannot find it on Microsoft. Can anyone give any indication as to how to find this please ?