Toshiba satellite C50D-A-133 won't boot when put on

[patkdee]

When put on it takes a long time then a blue screen comes on then it goes off again.

 

[webworkings]

The blue screen, what does it say? They usually have an error message.

 

[patkdee]

'Your PC run into a problem and needs a restart. We will restart for you".that's what it said then it went off, then I saw "Stop code;unmountable boot volume ". then started again with a blue screen saying 'your PC couldn't start properly' with some other things.

 

[webworkings]

OK but what were the other things? If it is still doing this, the message should come up again. The message helps determine the problem.