at least i wasnt able to install windows in my old computer again because the windows bootloarder keeped overwriting grub, and grub overwrited the windows bootloader, and os-prober didnt worked at all
You install Windows first, then Linux. Or install Windows, make an image, repartition, install Linux, whatever, then bring back the Windows image, just not the EFI partition or the MBR.
at least i wasnt able to install windows in my old computer again because the windows bootloarder keeped overwriting grub, and grub overwrited the windows bootloader, and os-prober didnt worked at all
You install Windows first, then Linux. Or install Windows, make an image, repartition, install Linux, whatever, then bring back the Windows image, just not the EFI partition or the MBR.