Question

what is the utility of disk cleanup

Answer 1

Disk Cleanup is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive
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Answer 2

Disk Cleanup (cleanmgr.exe) is a computer maintenance utility included in Microsoft Windowsdesigned to free up disk space on a computer's hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files. There are a number of different file categories that Disk Cleanup targets when performing the initial disk analysis:

Compression of old filesTemporary Internet filesTemporary Windows filesDownloaded program filesRecycle BinRemoval of unused applications or optional Windows componentsSetup log filesOffline web pages (cached)