This won't directly solve your problem but it might help you find the cause of it:
Go to Start > Search > All files and folders. Click on 'More Advanced Options' and check that there are ticks alongside 'Search subfolders', ''Search hidden files and folders' and 'Search system folders'. Run a search for *.* (That's star dot star if it's not clear on your screen).
That search will find every file on your laptop. Now click on the 'Size' column header, until the files are shown in descending order of size. (You might find that some very small files have no size shown, so that you'll have to scroll down to find the files which you're looking for).
When you've done that you'll hopefully know what is taking up all of the space on your hard drive. So you'll then be in a better position to deal with the problem.
Chris