I want to know if there is any free software available to expand OS drive i.e 'C' drive in windows 7. I inbuilt storage management feature in windows 7 doesn't allow to expand the OS drive. Please suggest me some software which can do this without any data loss.
just to clarify, you are trying to extend the "C" partition into adjacent unused space on the same drive, correct?
if windows 7's disk management can't do what you want, i find easeus's free partition manager to be fine for such simple tasks.