I have a problem in my hard drive free space

Assuming that this is your boot drive...

Space is taken up by paging file, hibernate file, system recovery points, and recycle bin. Less likely is that you created a small partition on a larger drive. I suggest that you download and run WinDirStat; it does an excellent job of scanning a drive and telling you where space is used.

You might try Disk Cleanup from the Properties screen for the drive.