Hey the First two seem to be fine and have been operating for about two years no sweat. This unit sarrived I don't know if the quality folks tested/inspected it before they shipped it out. There is no DVD/RW on the unit. Wireless USB? Cant find it. Most likely fell out of the opened box not taped up well due to shoddy And I mean very shoddy packaging. Bubble wrap just put here and there box flaps open. I have sent the seller a message on the Burner. I am using the machine as we speak. I will be installing Linux mint on the system as soon as the burner issue is cleared up. No Burner it gets shipped back. The other units are running great With Linux Mint 21.3 Easy install on both of them. We did have to replace the Bios battery's on both unit at around Six month. If you buy one just be ready. I will update the review in one week. Ok the burner Issue was cleared up fast NP. Now we keep the system and update the review to five stars for service alone. Nice to have vendors who pay attention. Now I checked out other unit for the wireless USB. The Wireless Bluetooth adapter. will not work with linux/mint at all we don't need it so we are fine that is just FYI Data.03/05 unit failed  exchange the unit for the same model. I had a backup of HD so no data loss. Unit arrives today. I will say these folks are fast and good at taking care of customers. On customer care alone these guy get 5 stars.