My Aspire is only 1 1/2 years old and for whatever reason, it has stopped reading disks. According to the sticker on the lower right corner I have a DVD-Super Multi DL drive. It still shows up in "my computer", but when I put a disk in (DVD, CD, program) it does nothing. I've tried clicking on the drive with a disk in and it ejects the disk, stating not a valid disk. Please help because I really can't afford to go buy any new equipment.