A full reinstall is a destructive process – everything on your C drive will be wiped clean as a result. Even if you perform a repair install, there’s still the danger that it won’t fix your problem and might even make things worse, preventing you from getting at your data. Therefore, it’s important to take steps to protect your personal files and maybe your preferences and system tweaks, too.
Step one is to look after your personal data: documents, photos, videos and so on. By default, these are stored inside your personal user folder on the same drive as Windows itself. So if you’ve not moved these folders on to another drive, it’s critical you back them up now. Windows has all the tools you need: Backup and Restore in…
