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Temporary Files Cleanup: Build 14291

With the appearance of the latest Insider Preview build of Windows 10 (14291) an interesting feature has appeared in Settings. It’s a tool for temporary files cleanup that also handles the Windows.old and other files retained by default for 30 days after a Windows 10 upgrade. Find it by following this item selection sequence in Settings:

System –> Storage –> This PC –> Temporary Files

[Note: You must scroll down to find the Temporary Files item under “This PC”. It is the penultimate item in that list.]

What Temporary Files Cleanup Looks Like in Settings

Here’s what turned up when I ran this on my Dell Venue Pro 11 this morning, updated to Build 14291 last Friday, but not yet cleaned up using either CCleaner or the built-in Disk Cleanup utility to clear away the previous Windows 10 Insider Preview build. It addresses all the common categories to conduct a temporary files cleanup.

Note the final item that reads ‘Previous version of Windows.’

This adds yet another method for cleaning out prior versions of Windows to the general bag of tricks. I imagine this will remain a part of Windows 10 going forward, but am curious to learn if this portends possible changes to the venerable Disk Cleanup utility, whose “Clean up system files” option provides another means for achieving the same end.

I’ve also noticed recently that CCleaner’s ability to handle Windows.old, Windows.$~BT, and other remnants of prior Windows releases tends to vary according to the release it’s pointed at. Right now, for example, it (and the Disk Cleanup utility) can handle those elements on my Windows 10 Enterprise Insider Preview just fine. But they’re balking at removing a folder in the Windows.old\Windows hierarchy named InfusedApps on Windows 10 Pro Insider Preview. Now that I double-check the new Temporary Files cleanup facility in the aftermath of an attempted clean-up using that tool, I see that the same folder persists following its use, too. I wonder what’s in that 124 KB folder that’s causing it to resist removal? To make it go away, I had to take ownership of the InfusedApps folder, and then manually delete all the folders in the hierarchy above and below it, all the way up to Windows.old. Strange!

[Note: here’s a shout-out to Richard Hay at, whose Friday 3/18 story “Windows 10 Build 14291 — Visual Changes and Enhancements” brought this newly-minted capability to my attention. Thanks also to him for responding to my comment to explain how to navigate to this facility.]