Hi there,

I am half noob and new to UEFI, I successfully install dualboot LMDE with win8 on a Thinkpad, I created 2 partitions one for root and one for swap to install LMDE, but I messed up the last step and installed the boot loader in the primary drive "sda" instead of the "sdb" which the system preselected for me, now I can boot only into LMDE no win8.

Everything still there so I could simply correct the boot loader to get back win8, and I tried to download the boot-repair tool but the site is down, and I downloaded the boot disk image from other site and created the boot-repair disk but it won't boot up on the notebook, so what do I do now ?

Boot Mint and put an entry in its /boot/grub/grub.cfg file. Sample below is to boot windows 7 on sda1. You will need to change the set root='(hd0,msdos1)' line to fit whichever partition your windows is on. Also will nee to change the UUID which is at the end of the 'search' line below. You can get that by typing the command 'blkid' (without quotes). If you are then able to boot windows, copy the windows entry to the /etc/grub.d/40_custom file and run: sudo update-grub.

If you want the Mint bootloader on sdb, you can install it there but you will probably need a windows 8 installation CD/DVD to repair the bootloader for win 8.

Thanks, will see, but it would be quite trouble to repair with the win8 disc, I've to build the disc from the HD image that will take quite some time.