This takes up space and, and if it’s no longer updated, may be a security risk. Most PCs contain software that is no longer used. I’ve done it, and it has worked perfectly, but I’d still recommend you assume the worst and make a backup. For this reason, Windows 10 keeps a copy of your previous installation (Windows_old) for 30 days, so that you can roll back to what you had before. I don’t know what the success rate is, but even if it’s 99%, around 3 million upgrades might still have gone wrong. Windows 10 is already running on almost 300 million devices, so we can assume that the upgrade process has been fairly well debugged. If it’s a mess, then some simple house-keeping could avert disaster. If your PC is in good shape and backed up, you may have very little to do. However, there are several things you can do to help the upgrade to go as smoothly as possible, and you need to take precautions in case it goes wrong. If the upgrade goes smoothly, all your programs and personal files should remain in place – with a few exceptions, which I’ll mention later. I have few questions: Will my files be deleted – documents, pictures, videos, music, etc? What will happen to Microsoft Office? Do I have to re-install it? What will happen to my anti-virus (I’m using ESET Smart Security)? Samantha M I’m currently using Windows 8.1 and I’m planning to upgrade to Windows 10.
