how to delete windows.old folder and files on windows 10 after windows 10 upgrade.

in this video, i have shown you "how to remove windows.old in windows 10" but this same method will work for "deleting windows.old folder in windows 8.1, windows 7.

Every time you upgrade your PC from an older version of Windows to Windows 10 without first formatting the hard drive, or when you install a new Windows Insider Preview test build, the install wizard will save a copy of the previous version inside of the "Windows.old" folder on your computer.



What is Windows.old?

it’s important to note first that Windows.old isn’t a new feature in Windows 10; it’s been part of the Windows upgrade process since Windows Vista and it serves an important role. The Windows.old folder contains important system and user files that let a user roll back an upgrade or Windows re-install to the previous version, either because something went wrong during the upgrade process or because the user later discovers an incompatibility with their software or hardware in the new version and needs to revert to the old version in order to restore functionality.

The reason that many users are seeing the Windows.old folder for the first time now is because this folder is only created during a true Windows upgrade, and the vast majority of users have not needed to perform such an upgrade in the past. Generally speaking, most users acquire a version of Windows when they buy a new PC, use that version until the PC dies or needs to be replaced, and then acquire a new version of Windows that’s pre-installed on their next PC. Because Windows 10 is a free upgrade for most Windows 7 and Windows 8.1 users, however, many PC owners are performing a complete upgrade of Windows for the first time and discovering Windows.old.

Therefore, due to its importance in helping you roll back a Windows upgrade, don’t delete the Windows.old folder if you’re still testing your hardware and software compatibility with Windows 10, as you won’t be able to easily revert back to Windows 7 or Windows 8.1 if you do. But also note that you don’t have an unlimited amount of time for this process: Windows itself will automatically delete the Windows.old folder about 30 days after the upgrade if no compatibility problems have been detected, so be sure to conduct thorough testing of Windows 10 as quickly as possible after upgrading.

As i just mentioned above, you can let Windows delete the Windows.old folder for you after a month or so, but that’s a long time to wait if you’re sure that your upgrade to Windows 10 completed successfully and your hardware and software are operating normally. This is especially true for users with smaller hard drives, as the Windows.old folder can be quite large.

So, to reiterate, if you’re sure that your Windows 10 upgrade completed successfully and you feel confident that you won’t need to roll back to Windows 7 or Windows 8.1, you can delete the Windows.old folder with the above steps. but in my case i upgraded my pc to the latest version 1703 which is currently available, and you are very sure that you do not want to rollback Windows to an earlier installation, then you may run Disk Cleanup Tool to remove previous Windows installations after the Windows Upgrade and free up disk space.

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