I see from the Lottery Post web stats that many people are still running Windows 8 on their computers. If you're one of these people, you really need to do the free upgrade to Windows 10.
Here is the link to an article that came out today describing WHY it is so important to upgrade: http://www.zdnet.com/article/still-running-windows-8-time-to-upgrade-or-else/
You should leave yourself about an hour to do the free upgrade. When you're ready, go to the following link and get started: https://www.microsoft.com/en-us/software-download/windows10