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Window 10 revert to previous window 7 or window 8.1

Reverting windows 10 to windows 7 or windows 8.1
If you’ve upgraded a PC to Windows 10 — not performed a clean install, but an upgrade — you’ll have an easy option that lets you revert to the last version of Windows. To access this, open the Start menu and select Settings. Click the “Update & security” icon and select “Recovery.”

You should see a “Go back to Windows 7” or “Go back to Windows 8.1” option. Click the Get started button to get rid of your Windows 10 install and restore your previous Windows install. Microsoft will ask you why you want to go back.

If it’s been over a month — or if you’ve run the DIsk cleanup tool and removed the “Previous Windows installations” files or deleted the C:\Windows.old folder by hand — you’ll no longer see this option. Windows 10 appears to automatically remove the old Windows installation files after a month to free up space.
This Uses the Windows.old Folder
How to Restore Your Files From the Windows.old Folder After Upgrading
This works because Windows 10 stores your old Windows installation in the folder named “C:\Windows.old” on your computer. You can see this folder in File Explorer, though you shouldn’t attempt to delete it from here. You can also browse the Windows.old folder and restore files from it.
7 Ways To Free Up Hard Disk Space On Windows
Obviously, storing every single file from your old Windows installation takes a lot of space. If you open the Disk Cleanup application, you’ll see just how much space it uses. Click the Start button, type “Disk cleanup” to search for it, launch it, and click the “Clean up system files” button.

Find ‘Previous Windows installation(s)” in the list, and you’ll see just how much space it’s consuming on your hard drive. If you’re sure you don’t want to go back to your previous version of Windows, use Disk Cleanup tool to remove those files and immediately free up space.
How to Downgrade if Windows 10 Doesn’t Give You The Option
Where to Download Windows 10, 8.1, and 7 ISOs Legally
Assuming you have an old computer you upgraded to Windows 10, that computer previously had Windows 7 or 8.1 on it. That means that computer came with a product key that allows you to use Windows 7 or 8.1 on it. To get back to an older version of Windows, you’ll have to perform a clean install of Windows — something PC geeks often do on new computers, anyway.

Thankfully, Microsoft now offers easy downloads for Windows 7 and 8.1 ISO files.

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