Had this same problem upgrading from 10.04 to 10.10 , while wubi was installed in D partition and Windows 7 on C.
Symptoms: Not being to able to boot Ubuntu , while being to boot Windows7 successfully. Solution: Copying wubildr, wubildr.cfg, wubildr.mbr from C to D solved the problem smoothly. -- grub-pc upgrade renders computer unbootable when Wubi is installed to partition other than Windows https://bugs.launchpad.net/bugs/610898 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