Dell 660 tower. Rebuilt 1 year ago with new ssd and doubled the ram. It has Intel i5. it was working fine. 10 to 15 second start up. Friday I was booting into bios to record the correct settings when the screen went black. Shut it down and rebooted it. When the Dell logo appeared the wheel started turning but it took 10 minutes and then the login screen finally appeared. It functions just as fast when I'm in it but still super slow start up. Before the bios boot try I had changed no software settings. I tested the ssd in another computer and it's ok. Swapped the ram. No change. I checked the startup page and turned fast startup off and then tried with it back on. Nothing. Startup apps are delayed. I unplugged all unnecessary usb accessories. Nothing. Help!