Hello, I need your help

Two days ago I was editing in Davinci Resolve, and suddenly the timeline froze and stopped showing any image or playing audio. I restarted the software, and previews and timeline show all black. When I press spacebar, it does't do anything. I can't even hear wavs audio in preview. I reinstalled the software many times, different versions. This morning I even did a fresh install of Windows 10 and the problem persists. Any ideas? I'm desperate

Ryzen 7 2700, 15gb ram, gpu RX 580 8gb. Drivers of GPU and Motherboard are updated.