Blue Screen - Restarting And Skipping Scandisk

My windowsXPpro has hung and given me a blue screen and it says smth like: "A problem has been detected and windows has been shut down to prevent any damage to your computer. "If this is the first time you have seen this stop error screen, restart i'm not too sure what the message is as my laptop will have restarted before i even get to read finish the screen.i knw this isn't helping much but until it happens again, i can't provide more information.
After restarting, it'll go into scandisk as normal after a crash. however, it will then scan VERY slowly until about 56% where it will hang. i think there is a last message but as it took me many MANY tries restarting and skipping scandisk