Got the notification on my Windows 7 Toshiba laptop that the download was done for my laptop, and it was ready for install. I cleaned out all unnecessary software, used ccleaner to clean up all temp files, trash, ran a full scan of Microsft Security Essentials,etc. Ran disk defragmenter, disk cleanup, and updated windows software and continually did windows updates. Had everything my laptop needed. After 4 tries and continual updating, it would not install. It kept stopping at the driver install section, so I updated all drivers, and removed the ones no longer needed. Then I did a clean boot, and it stopped at the configure section of the install. I decided to leave the laptop with Windows 7, and once all the bugs are fixed on Windows 10, I will give away my Vista desktop PC and get one that comes with Windows 10 already installed. The upgrade worked for my sons laptop (he went right to the site and downloaded it, did not use the app), but after 14 total tries on mine, I decided I like Windows 7. It works fantastic for me.