@Xtigyro I take a closer look at the previous steps, I think the one that breaks is the very first grub-install, while the active flag is in ext3 partition. After that, no matter what you do, the result would be the same. Windows keeps a mapping of partition and drive letter in the registry. When you use grub-install to install to mbr, it invalidates the mbr checksum, and windows rebuilds the mapping. But as the ext3 partition is active, it became C:\, and the original windows become D:\. this would cause problem as some system files can't be found. It doesn't matter if you change the active flags back or rerun grub-install, it's the same mbr, and windows won't refresh the mapping again.
-- grub fails after running Windows https://bugs.launchpad.net/bugs/441941 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs