1) A lot of Google information on this issue which isn't always easy to fix
2) You can usually restore Windows from a hidden partition on your computer (see your manual) You will lose all changes since your computer was purchased. You should also be able to request backup CD's from your laptop company (you'd think a $1000 laptop would get a backup DVD included, wouldn't you?) I got backup DVD's from HP for my dad's laptop because if his hard drive failed the hidden Windows Image would be useless.
3) When you get everything fixed, make a backup of C-Drive (Windows drive) using a program like Acronis True Image. Place the backup on a second drive or span to DVD. If you span to DVD, you must use your DVD drive as the backup location, you can't copy files to a hard drive and simply use a program to place them on DVD's.