Гілка دوستان برای نصب اوبونتو بدون دوال بوت کردن اگه نصب کنم حذف نمیشه اطلاعات رویه دسکتاپم

Of course you can. You just have to select the manual partitioning method and tell the installer not to format any partition you want to use. However you'll have to create at least an empty ext3/ext4 partition where to install Ubuntu (you can choose also to create another empty partition of about 2Gb to be used as swapspace). You can repartition your hard drive, for example, using GParted livecd. Ubuntu will also install grub2 for you, detecting your other Windows installation. Good luck!