From what I know about this problem, it seems to be caused by the installation of some additional software that creates a false pointer to the path you mentioned above. The path C:\Program Files\Microsoft
is not a default path.
My advice would be to download Autoruns from Microsoft and check the entries under:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
This is one of the locations that auto-start programs store their entries. Take a look at the entries listed there and and one by one uncheck the box to the left and restart; try to establish if it's one of these entries that's responsible. Once you know which are responsible, you can re-enable the others.
I wouldn't simply advise leaving the responsible entry unchecked, without doing some research on exactly what it's responsible for. It may be important...
1You really should explain in more detail what your problem is, i.e. what are you experiencing, what do you want to achieve etc... – Palmin – 2010-06-20T08:25:44.040