I have a similar problem. I have Windows 7 64bit on sda1 and Kubuntu on sda6. Grub1 is working fine, but grub2 lead to a problem with windows boot. Windows 7 reboots computer after animated logo, just before (I think) showing desktop.
It is probably related to bug #402154 which is marked as solved, but shouldn't be. Another bug concerns Windws XP, but can put some light on this one: bug #454930 Another bug #486499 similar to this, but proposed workaround doesn't help me. -- Selecting Grub2 menu item for Windows 7 reboots PC https://bugs.launchpad.net/bugs/475881 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