Here's something I used to do when the black screen came up.
http://maximumpcguides.com/windows-v...en-booting-up/
That way you don't have to pay anyone to do it. If you saved your stuff most likely your good. I hope you do have a memory stick and have all your pictures and important info save in it. If not go ahead and buy it since it's always handy. If you don't have alot to save a 2gb or 4gb is fine. I need a 16gb for all my junk
If your writing stuff remember to save after every paragraph.