We recently experienced an installation of Windows 10 with system files that were totally corrupt. After attempting typical repair options, we used a Windows 10 ISO to perform an in-place upgrade, reinstalling Windows 10 while preserving even the software you have installed.
Did you know that a full copy of Windows can be installed and run from a USB drive? Microsoft introduced "Windows To Go" with Windows 8 Enterprise and has continued supporting the feature in Windows 10, which can be kept on a pen drive in your pocket as a portable operating system.
Having a virtual machine on-hand can be useful for a variety of purposes, such as testing software or tweaks in a sandboxed environment that is separate from your primary operating system. A virtual machine can also help you to run older software that doesn't work with your new operating system, or simply exploring a new operating system altogether.
If you've been thinking about reinstalling Windows 10 because of stability issues, driver errors, malware infections, software bloat or any issues with your system, it may come as great news that Microsoft has built in a simple method of reinstalling the operating system without deleting your user settings or data.