Hi All, A Bug in Fedora Core GRUB intall causes the disk geometry to be modified from LBA to CHS Format.The partition table now has both CHS & LBA value.Linux ignores CHS values but Windows messes up failing to boot. I'm experiencing the same trouble,due to which i'm not being able to boot windows,however linux can still boot. original disk geometry had 255 number of heads initially and was changed to 16 after the partition was corrupted by Fedora Mentioned in Bugzilla at:https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=115980 None of the solutions suggested to the problem: Setting BIO