Battery was missing and Windows was not installed. Had another battery that I could use so I reached out to seller and they are sending windows installed on a flash drive, so I should be up and running by end of week. The computer does make a bit of a buzzing noise from the fan. Hopefully that won't get any louder.UPDATE: Received USB with Windows but could not install.  After several attempts, I found out the hard drive was bad. Have to return. This is the 2nd HP elite desk I've tried and had no luck with. :(