I recently bought a laptop with windows 10. All seemed OK but then I let it update. It downloaded about 3GB of updates and produced some error messages, including a notification saying that there was a disc problem, click to repair. I did and it didn't. Windows now boots but doesn't get to the desktop screen. Instead it goes into repair mode but none of its options work. Resetting your PC results in 'There was a problem resetting your PC' There's lots of room on the disc. What do I do?