Another thing that will clear up lots of space is to clear the System Restore points. Enter Control Panel and go to System. Click System Protection at the left, then click Configure. In the new window that appears, click Delete, which removes all current restore points.
If your system is configured to allow System Restore to use a lot of space for restore points, consider moving the slider further left to limit this. A good limit to set I find, is anywhere between 10 and 20% of the drive. Letting it take any more than that is usually a waste of space.