There is no "Share With" when I right-click on the folder (Windows 7).

There are a number of ways to do this, however, a few easy ways are: first, before anything back up your data. In case something goes wrong on the install you should always keep a backup on an external drive or a series of DVDs/CDs. Windows has a built-in tool to do this. Second, insert your install media (with the computer on and logged in) and the installer should open with a button that says Install Now. You should be able to start it there, but if you cannot proceed to step three. Three, If you couldn't upgrade with the computer on, keep your install media inserted and restart the computer, while hitting the F12 key, select the media and then choose upgrade on the menu.