Nvidia Drivers Still Running After Uninstalling Them

I have recently suffered from random shutdowns. We tried to debug it here in sevenforums and got to conclusion that the problem might be in my Nvidia drivers so now I'm in the process of uninstalling them completely and then re installing them.So I have downloaded driver fusion, but I'm also considering using this thread: How to: Remove your Nvidia GPU Drivers.Anyways, either way, the first part is to uninstall drivers from programs and features list. I had six Nvidia programs there. I started uninstalling them one by one. I got to graphics uninstalling part, and it required restarting the system. I clicked OK, but then my computer screen just went black, and I had to manually press the power button to shutdown my computer. ( Later I saw some tutorial which said you should uninstall everything except graphics program first, then uninstall the graphics program, so that might have caused the weird uninstall progress )

The whole uninstalling progress was weird. When I restarted my computer, I was in 640x480 resolution ( which is normal after uninstalling drivers? ) but the computer required restart of the system, so I went ahead and boom, it restarted with nvidia drivers on and with full resolution. I noticed, that the Nvidia drivers were older version, that I had updated from while ago. I did some research and found out this was quite normal that windows just rollbacked the drivers.Anyways I did this process so many times, that I got on the first nvidia drivers I've installed ( I guess ). Then I uninstalled them and it restarted without any Nvidia drivers in programs and features list, but I STILL HAD ALL THE FILES IN MY C: DRIVE. Also, the nvidia control panel didn't show up in taskbar as usual, but I could open it by typing it in Windows Start and clicking it. I tried to delete some Nvidia folder from C: but I couldn't because it was in use. It seems I have the oldest Nvidia drivers ever installed on this computer ( 301 sth. ). My screen is also in full resolution (ofc).How I can uninstall Nvidia, when it doesn't show up in programs and features list and start to delete the entries manually or with driver fusion?