I first installed Windows first, after it I installed Linux so that both OSs functioned on the same computer, but were located on different partitions of the disk. Shared a disk using acronis disk director suite. Everything worked and the GRUB bootloader displayed both OSes when the computer was turned on.

But something happened. In my opinion, I changed the main active partition with the same acronym. After that, the same algorithm for installing two operating systems no longer works. Now, after installing Windows 7 and Linux (ROSA), when you turn on the computer, the GRUB boot loader displays only one OS that was installed last. Although both operating systems were installed on different partitions.

  • Try to add a second OS to the hornbeam. Maybe the hornbeam does not wait for the choice of the OS and immediately loads by default? - Senior Pomidor
  • You install two axes and there is no Windows in the download. Right? Perhaps when installing Linux, Windows download files are deleted. It was once that Windows was on one disk and the download files (hidden) on the other and when the second formatted disk stopped loading. If I am not mistaken, you can go in two ways: 1) to make active (or main. Confused) the partition where Windows; 2) change the installation location of the axles. - Alexey Osinny
  • All of these dual boot systems work until the first crash. It is high time to introduce multiboot hardware into BIOS, but sins and backward compatibility requirements are not allowed into paradise. - pepsicoca1
  • @ pepsicoca1 Well, there are such attempts, at least on laptops - Viktor Tomilov
  • @Viktor Tomilov Honestly, I did not see any support for dual booting from a single disk in BIOS. Even (and maybe even more so) in the laptops. In any case, in my laptop (age 2 years) it is not. - pepsicoca1

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