Today's hard drives feature jaw-dropping amounts of space. But no matter how big your drive, you'll be amazed at how quickly application installs, browser caches, and temporary files can eat up your free space and clutter your system. Some simple hard-drive cleaning measures can free up valuable disk space and get rid of applications and data files that you no longer use or want.

A raft of commercial utilities can help clear disk space, but you don't need to lay down the bucks to get the job done. Windows has an array of built-in tools for doing a thorough drive cleaning. You can sweep away many megabytes--and sometimes even gigabytes--of unneeded files.

As always, before you begin, do a complete backup of your system.

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