The Xbox One was not designed to be stood vertically and doing so could result in a number of problems, according to a Microsoft executive.
Albert Panello, a senior director at the Xbox business, warned prospective customers: "We don't support vertical orientation; do it at your own risk".
"It wouldn't be a cooling problem, we just didn't design the drive for vertical. Because it's a slot loading drive, we just didn't design it for both," he told Gamespot.
Like the Xbox 360, Sony's new PlayStation 4 is designed to stand in either orientation, but Panello claimed that only a small proportion of customers want to stack their machines vertically.
"We found, interestingly enough, that 80 per cent of people, believe it or not, have their Xbox 360 horizontal".
Xbox One will release across thirteen territories on November 22.