I have Windows 7 and just installed Ubuntu on other partition but it didnt give me grub2 loader to choose which OS to start, so it just booted into Ubuntu. I wanted to fix it by using Windows 7 repir cd and write some commands like boorec /fixmbr and so on...Unfortunately, i didn't fix anything but just screw it even more...Now when pc starts to boot i get message Missing operating system and i cant continue. I need somehow to create a new windows 7 loader fast or something but i dont know how... i need help fast.
On Windows repair disk system recovery won't detect Windows 7.

Start over fresh... Try Linux then Windows 7, not the other way around as you did