Sure. Run Treesize Free. It will tell you what is using your hard drive.
You need to show hidden files as well:
XP, Vista and Windows 7:
Open My Computer, Tools menu, Folder Options.
Click on the View tab.
Windows 8 and Windows 10:
Open This PC.
Click on View tab then Options at far right.
Select Change folder and search options.
All:
Check Show Hidden Files, folders and drives.
Uncheck Hide extensions for known file types and Hide protected operating system files [Recommended].
Click Apply then OK.