I recently suffered a Blue Screen of Death episode leaving leaving me terrified about losing important business info (despite a pretty good backup regime). After finally working out what the blue screen said - I actually had to take a photo of the page as it flashed up to be able to read it - I found this article [webmasterworld.com...] I followed it and bingo!, a recovered laptop. The lesson is BE PATIENT! My laptop went through the chkdsk cycle 5 times and took over 5 hours before it finally sorted everything out. But it did it.
Many thanks to the author of the original article for preventing yet another sleepless night.