So I have a question. My Windows 8.1 OS had some corrupt system files. It only affected a few files/games (ie. Elite Dangerous crashes 5 minutes after I start it). Will the upgrade to Windows 10 completely replace all my 8.1 system files? If not then will a clean install of Windows 10 replace all files? I didn't want to pay Microsoft to fix the files until W10 came out just in case. I hope W10 will wipe away all the old corrupt files.