If you're still on Windows 10, then very clearly you have no interest in "Upgrading" to Windows 11, and Linux isn't something you want to use yet.
Following this comprehensive guide, you too can take a copy of Windows 10, upgrade the edition to Enterprise, and give yourself a fresh start with software. This should buy you enough time to get good with an open-source alternative, or wait until Microsoft learns their lesson and… yeah right. Just use a Linux already for pete sake but if you cannot do that, then this guidance should help you get along with your computer much better, after it quits trying to promote absolute garbage to you.
You don't necessarily need to back up your files in%userprofile% but you might want to. While ideally, everything from a former Windows installation should end up in a separate location at %systemdrive%