My Dell Vostro 3450 came with Windows 7. After a few days I upgraded to Windows 10. Then, a few months after that, I wanted to go back to Windows 7, the factory reset option was missing so I reset the computer. It re-installed Windows 10. Therefore, I stupidly installed a disc version of Windows 7. Now my internet is missing, and I can no longer use high laptop resolution. So I'm stuck with a laptop running Windows 7 that has no internet connection or good graphics. However, I still have the Windows.old folder which used Windows 10. My question is: how do I restore Windows 10 alongside the internet connection and high resolution abilities?