I think the main issue is the loss of internet connection. First run the network troubleshoter to find the root of the problem, it can be the router (rebooting the router may help) or some corruption in windows or the hardware. Second, if the return info is not clear, try to reverse to the previous status (check the uppdate history in settings).
Using a Windows 7 laptop (32 or 64 bits?) may involve the update to Windows 10 and then download the Pro version, burn a DVD for booting and hope for the best.
When the internet is restored in windows 10, use the GetHelp App from the MS store. You'll need the product key from Best Buy, MS will check if it is legal. But you need to fix the internet issue first, without internet there is no help. Saving your stuff is always a good idea no one can tell what's gonna happens. Thw Windows 7 way may involve a clean install and everything is erased.
Good Luck, Fabio