I am having Acer Extensa 4620Z laptop. I had issue with this Acer laptop. It stopped working, couldn't find os or hard drive. Because of that I used the acer recovery disc to recover my data. When I inserted first disc it tells me loading RAMDISK image, I then choose english language and restore factory default system. And when I inserted second disc, I got 'device does not exist' error. I am not getting how to solve this Acer recovery disk Issues. Please help me over this issue.