Cannot open local drive C and D directly

When I try to open my local drive C: it will not open directly, a dialog box will appear and you will select what program you need to use to open the drive? what could be the problem? please help.


SOLUTIONS

I was lucky enuff to have this answer!!!!!
go to run

Type " regedit"

then find " ctrl+f"

in this box write "mountpoints2" and delete it ......

then again press "ctrl+f" again to find all mountpoints2 until ALL of these files are deleted
"there are a few of them!"

Prob solved!