Ladies and Gentlemen so far my clients have had better than a 50% failure rate on the free upgrade. My suggestion would be to wait a little longer, you have until July 29, 2016 to use your free upgrade. If you have any software that is a must to your business or personal use then please take a moment and go to the manufacturer website to check its compatibility with Windows 10.
Unfortunately when Microsoft brings out a new operating system waiting for the 1st Service Pack is a must. Please do keep in mind there will be a learning curve to the changes and to Microsoft’s credit they did give us back part of the feel of the Windows 7 desktop.
Please consult with your IT Gal or Guy for any additional information before proceeding with the upgrade. Remember the only stupid question is one you don’t ask us.