Permit me to add a bit more about Windows Disk Cleanup.
For Windows 7 & 8. ..
Disk Cleanup is one of those Windows Utilities that has some powerful features that Microsoft leaves turned off by default. The two I'd like to deal with here are the Advanced cleaning options and the Update File Removal.
Unlocking the Advanced Cleaning options is a two step process. First, one needs to tell Disk Cleanup what they want cleaned, then tell the program to follow these instructions when performing the actual cleaning.
Advanced Cleaning. . .
To configure Disk Cleanup, enter this command (or put this command into a shortcut.)
Note: You can use any number, as long as you use it consistently.
When this command executes, it will open a window to let you select cleaning options.
Once the configuration is completed, enter this command (or put this command into a shortcut.)
For an extra through cleaning, execute this command using "Run as Administrator" once and again using each user account.
Update File Removal. . .
A short while ago, Microsoft augmented Disk Cleanup, adding the ability to remove outdated Windows Update files. To add this ability, one must run Windows Update KB282386.
After your system installs this update, a "Clean Update Files" option will be added to the choices you're given when running Disk Cleanup.
Hint: Do the update first, that way, the option can be set when setting up Disk Cleanup choices for Advanced Cleanup.
P.S. Advanced users may wish to create a variety of cleaning profiles. To do this, simply assign a different number to each.