hello, a week ago as my pc was working normally, suddenly my screen froze and had various green red dots and lines. as i restarted my pc the same lines and dots appeared also as it was loading until the toshiba logo. after that my screen would go clear black and windows wouldn't load. so i restarted went into safe mode and unistalled nvidia. my pc would load normally but the green dots were still there. after that i fully restored my pc and i still have the same issues as above. any suggestions?