When shutting down Windows XP today, it installed updates before shutting down, but I didn't hang around to watch what was going on. When I booted up my computer later, I got my normal boot manager screen where I choose between Windows or Ubuntu. After selecting Windows, the hard drive showed activity for less than 2 seconds and then the computer completely locked up: no mouse, no cursor, and certainly no Windows splash/welcome screen. Also no way to get into safe mode either.
Obviously, something very basic got corrupted or something, because after I select Windows at the boot manager, the computer goes no more than 2 seconds before freezing. FORTUNATELY, I can still force mount the NTFS partition in Ubuntu and can work on it, but I have no idea where to start.
Can someone please give me an idea of what might be the problem and how to fix it? I really would appreciate any help.