An OS freeze that splashed the hard drive so Windows wouln't "recover," had me pulling out my backup big box computer only to find that in the six months since it was last turned-on, the cooling system had leaked all over the motherboard, and it wouldn't boot, of course. Looking at a $Grand to repair all the damage, and considering that it had been turned-on once ever six months in the last two years, I decided to look for a $CHEAP$ working PC with lots of USB ports for $100 to $200 and move the guts of it into my big aluminum rolling computer box with the huge power supply and array of drives.That's what I was planning to do until I removed the refurbished HP Elite 8300 i7-3770 from the shipping box and unlatched the top of the case. The inside was a small space packed from top to bottom, I noticed there were green plastic thump tabs, some pushed, or slid, and all of them unlatched whatever they were holding in-place so that item could be hinged over and outside of the box without removing a screw or clip....This is professional commercial grade rig! It's designed to make it easy to be upgraded and repaired with the minimum of effort and time for I.T staff.  I sat there playing with this computer turned transformer and marveling at how well built and laid-out the case and innards were. My big box rolling computer case is about to be put out to pasture.Fifteen minutes after connecting power, monitor and HID's, Windows 10 was activated and working on updates.ITSupplyGuy did a great job refurbishing this computer. It came with everything needed for it to be immediately useful requiring only a monitor to be attached long enough to enable remote desktop.  The working parts inside are all new or "like-new," I can't tell which because it is so clean. There's no dust between any of the cooling fins, for goodness sake!  Really, really a great job of refurbishment.