There was a noise problem on my PC in the beginning. Either it came that way, or the computer shop did something when they were upgrading to 8GB RAM, replacing the CD-ROM with a DVD burner, or putting in the mobile-rack. Anyhow, my tech guy got into the PC, took out some screws, applied some silicone flexible sealant/glue somewhere, then more under the screw heads, put it back together, and no more vibrating. I'll never get into the PC myself, but I buy Gorilla Silicone Sealant, 2.8oz. Clear, and use it a lot. It dries into a flexible rubbery mass. Last used it on the table fan grating to stop them from chattering together.