Clean Without the Risk: Microsoft Tells Users to Ditch Third-Party Cleaners
Windows cleanup utilities have long become a genre of their own. Some people install them to reclaim a few gigabytes of disk space; others simply enjoy the comforting sense that the system has become “cleaner.” Microsoft, however, appears keen to restate the obvious: for basic housekeeping, you do not need third-party cleaners—or even proprietary optimization tools.
The company explicitly points out that Windows already includes built-in utilities capable of removing temporary files, caches, and other digital debris that gradually clutters storage. This is not about performing a “clean” reinstall of the operating system, with everything reset from scratch, but rather about safely clearing accumulated temporary data that consumes space and can quietly grow to significant volumes over time.
The first and most convenient tool is Storage Sense. It can automatically free up space on the system drive by removing unneeded items such as temporary files and the contents of the Recycle Bin. In many cases, it is not enabled by default, so it is worth checking: open Settings, go to System, then Storage, and turn on Storage Sense if it is disabled.
Microsoft also draws attention to the classic Disk Cleanup utility. This familiar tool scans a selected drive—typically C:—and then allows you to choose exactly what you want to delete. Crucially, it includes a “Clean up system files” mode that runs with administrator privileges. This is where the most space-hungry categories often reside, potentially recovering several gigabytes by removing old Windows Update components, Delivery Optimization files, DirectX shader caches, and other residual system data.
That said, Microsoft issues an important warning: the checkboxes in Disk Cleanup should be treated with care. In the past, the company has faced criticism when cleanup operations unexpectedly affected the Downloads folder—an unwelcome surprise for any user. Another option requiring caution is the deletion of restore points and volume shadow copies. These are generally left untouched unless there is a clear reason, as they can be invaluable for system recovery.
Finally, Microsoft highlights manual cleanup of temporary files stored in the Temp folder. In theory, Windows removes these files once tasks or applications finish running. In practice, some files can linger and accumulate for months. In such cases, a manual cleanup can help, and Microsoft’s support site provides step-by-step guidance on where to find the folder and how to clear it safely.
A separate point is made about a popular habit among enthusiasts: deleting the contents of the Prefetch folder located at C:\Windows\Prefetch. The guidance here is clear—this is usually not advisable. These files help Windows operate more efficiently, and the space savings are typically negligible, often measured in mere tens of megabytes. If the goal is to free disk space, this “ritual” offers little benefit and carries a very real risk of degrading performance.
The conclusion is straightforward: if you install cleanup tools solely to delete temporary files and caches, Windows already does this on its own—free of charge and without extravagant promises to “double your computer’s speed.”
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