cannot boot windows after update-grub

[drave]

Binary package hint: grub2

after running update-grub the windows entry looks like this

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sde1)" {
 chainloader +1
}
### END /etc/grub.d/30_os-prober ###

this will NOT boot windows. "Inavlid signature" error message.

The original after installation which boots ok looks like this

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sda1)" {
 insmod ntfs
 set root=(hd0,1)
 search --no-floppy --fs-uuid --set 90940fdf940fc6a6
 chainloader +1
}
### END /etc/grub.d/30_os-prober ###

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for grub2 (Ubuntu) because there has been no activity for 60 days.]