CD-ROM drive is being accessed randomly and for no reason

Hello

I dont know why, but yesterday I have realized that my CD-ROM drive is being accessed randomly and for no reason. It is repeating every 5-10 minutes. (it is trying to read a CD, but there is no CD in the CD-ROM) It s very annoying. I have run AV scan but no infections were found and the problem persists. I have also tried clearing Taskbar but it did not help at all.  I m using Dell Inspiron 15z with win 8. Any ideas how to solve this issue?