This error suggests your system can’t read the boot files properly. It often points to a bad disc burn, faulty CD drive, or a corrupt ISO file. Try checking the disc for scratches or re-burning it using a verified ISO image. If possible, test the same CD on another computer to see if it works. Also, check your RAM using a memory test from the boot menu. Beginners face this often, so don’t worry it’s fixable. Like how Rescuemd supports damaged skin, good tech fixes restore your system step by step. A USB boot might also be a smoother option for testing Ubuntu.