Seller stated, in answer to a question, that you can install a second hard drive. Nope. There is no header, nor is there a place for it. I ordered this AND a hard drive to put into it. Now I'll be returning both. I actually called tech support twice, and, during both calls I could tell that they were giving me answers that only apply to an hp 8300 tower(full size), which has an open 3.5 bay, 2.5 mounting location, and, 2 open sata ports. The seller and tech support should know that this is not the full size tower. I've decided to keep this and install the second hard drive in an external case or use it to replace the 120 gig. I'm actually very happy with performance. By design, the dvd drive actually sits @ 1/8 inch behind the case front. It's fine. So far I've played music, good sound, btw, this pc has a built in speaker ! I hooked it up to an extenal amp, downloaded a dvd player app, free, from windows store, played a dvd movie without issue, and did some web surfing. The wifi works well, the keyboard and mouse are nice, and, were boxed to also include a computer power cord, which is not for this pc, however, it's included, and, maybe you'll need it someday. Windows activated without issue by updating the product key. Instructions were included for activation, were clear and easy to follow. There was some farm hero saga game installed, easily deleted, and it comes with office apps labeled as word 2016, excel 2016, etc. There are english, french, and spanish versions, so deleting the unused versions will free up some space. There is @ 82 gigs of free space.  The pc is almost 5 star, seller knowledge of product is lacking and tech support is a joke. I recommend buying this but can't go higher than 3 stars.