Disk Cleanup works the exact same way in Windows 8 as in previous versions, but finding it is a little trickier.

Click the icon after it comes up in the search. You’ll be asked to select a drive.

Select a hard drive where you’d like to clean temporary files. Then, after Windows calculates how much space you’ll save, you’ll see a list of options. Select one or more of them and click OK .

Scroll down to see all the temporary files you can remove.
Choosing Temp Files to Delete

Though only a few items are checked by default, feel free to check more of them. Please note, however, that once the files are deleted, they’re gone forever. The good news is that there’s almost no situation where you’ll need any of these temporary files. Here’s one exception to take note of: If you’re on the phone with Microsoft Support immediately following an error, they may need to see the error log files. If you’re at all concerned about that, leave that option unchecked.

This cleanup process will take several minutes, and then you’ll be able to take advantage of the free space immediately.
More precious space on your hard drive is always better. Windows uses free space on your drive as temporary RAM, called virtual memory. Plus, you want space on the drive for more important things, like new applications, videos, photos and music. You can gain back gigabytes of space using Disk Cleanup. Try it out.

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