First, the good news: your hardware appears to be in good working order. Now the bad news: finding out what’s happened to Windows. There are two routes to follow here: the first involves Windows’ built-in repair tools, summarised opposite. The problem may be accessing them.

Windows’ first recourse is its own Start-up Repair tool, which should run automatically after a failed attempt to load. If it fails to fix the problem after several attempts, it should bring up the advanced start-up tool with