Hello i want to set up a dual boot with Win xp on my 250gig and Fedora 10 on my 80gig hard drive. I installed windows on my 250gig and i installed Fedora Core 7 on my 80gig and all was successful and i could boot to either os. I then decided i wanted to change from FC7 to Fedora 10 so i burned fedora 10 to dvd and installed it and got all the way to the boot screen but when i try to boot to fedora 10 i get Error 17:cannot mount selected partition, and when i try to boot to windows i get Error 13: Invalid or unsupported excutable format. If i reinstall Fedora Core 7 over 10 it solves the problem and i can then boot perfectly again to either operating system. I think it may be something to do with the grub boot loader but im not sure. Any ideas would be greatly appreciated.