So my computer has been quite slow for the past few months and today I decided to reinstall windows. I went from Windows 7 Professional N to Windows 7 Ultimate. Both were not bought by me and I just activated Ultimate with the phone system. The problems start here, when half the drivers that I had backed up, after restored, didn't work properly anymore and then 4 of my back USB 3.0ports don't even work anymore. My normal keyboard that I used to use just fine doesn't even get recognized when i plug it in,so I had to dig up some old logitech keyboard that fortunately worked. But now when I started to install programs back one by one, every single one of them ran into at least one issue. Currently I can't even log on my nvidia geforce exoirience, because the login popup window is simply black. nothing on it. I want to know if there's any point in trying to fix this broken of a Windows machine or should I try installing Windows 10? If I do install Windows 10,how do I get drivers straight away and how do I find a network adapter? I would have made a nicer intro but I feel so drained and in such a bad mood so I'm sorry about that. I spent around 6hours today trying to make everything work. I also still have my Windows.old folder, so is there anyway to rollback to win7 professional and with all my settings? Thank you everyone in advance who decides to help and I certainly hope you guys never mess up like this.