I am almost ready to install Windows 10 on my PC that’s currently running Windows 7 Home Premium (x64) Service Pack 1 (build 7601) I have only installed Windows 10 on one computer this was a Toshiba laptop. At the time I would have liked to have done a fresh install (deleting all the previous Windows 7 and more importantly all the Toshiba features that seemed to causing me so much trouble). During the installation that went on for several hours, I never saw anything that gave me a choice for Clean install or Upgrade. Perhaps I missed it. I have to say I was surprised that it did an upgrade and as a result all my settings, email set-ups remained untouched. The computer worked better that it did when new. Now my question, this time I wish to do an Upgrade (as it did with my Laptop). I want to upgrade and NOT Do a fresh install. How can I be sure it does that! I am a little apprehensive about the whole procedure as this is my main computer. I have several email accounts and losing all them alone will give me hours of work, something I don’t want. I have done loads of backups, just in case. I was disappointed with the process before, Windows did not seem to give any indications as to the progress of the installation. It just completed (I think in about 5 hours) and it worked well, very fast and I was very relieved. Anything I need to know before I start?