Norton's Win Doctor : C:WindowsSystem32MAPISRVR.exe cannot access a necessary file gapi32.dll

Everything seems to be working fine. But Norton shows the above problem.Can anybody tell me what this is and what I need to do? <img src=/S/help.gif border=0 alt=help width=23 height=15> <img src=/S/heavy.gif border=0 alt=heavy width=40 height=34>