Have black screen of death. Been told need new motherboard?Win 10 was apparently the cause which I assume is on the hard drive. If can get MB how do I get rid of win 10 before it wrecks another MB or do I change the drive as well? Not a geek but capable of replacing all parts internally and following instructions. Simple advice please.Expensive kit to just dump as have been advised. Dell don't want to know as out of warranty!!