reinstalacija dual boota.

This quick help will tell you how to reinstall grub without reinstalling whole system again.

Get Gentoo Live Cd or some other live cd that can access with root priviledges to your computer. Boot it and do this:

Use fdisk to find out where linux is installed. (hardrive, partition etc.) you don't need any other commands besides p(print partition table) ja q (quit fdisk) Then do this:

mount your linux partition to /mnt/gentoo, for example I use this command:
Code:

mkdir /mnt/linux
mount /dev/hda6 /mnt/linux
cd /mnt/linux

then do root change with bash exit:
Code:

chroot /mnt/linux /bin/bash

Then start grub and reinstall it to MBR with typing:
Code:

grub
root (hd0,0)
setup (hd0)
exit

root (hd0,0) this is where your boot folder is located (the folder where GNU/Linux OSs will be booted from), if you don't have boot partition then use your linux root [/] partition for this. First number tells HD and second its partition. I have boot partition at beginning of my first hard drive so it is 0,0 for me.

setup (hd0) this is where grub is going to be installed, which hard drive that is going to boot it. If you have linux in your computer first harddrive then 0 is allright. if it is located on second then it is 1 and so on.

then you can exit your live system by typing:
Code:

exit
reboot

And if you did everything right, then your grub will be starting instead of windows. You may have to do this again if it won't work at first time. Nobody can do this at first time. I know it from experience, but when you succeed in this your skills with grub will increase a lot.

this mayt sond a little bit wicked, but it works. And is the easiest sollution when comparing the time.