Macbook 2008 constantly spits out discs, but is working, what should I do?

Question

macbook

Please tell me, I put mac or linux or windows installation disks, they are displayed on the desktop and when launched in a boot, and other dividends and sidish just spits out, even clean ones. I don’t know what to do with it, I read something on the epl website, threw off the smc settings, but I’m also not completely sure that I reset them. Guys, I don't know what to do. Let's go within the framework of the decision on poppy, and not - "Install Linux and sit on the drive from Linux" or "Install Windows"