The Xbox One is not a machine that should be stood vertically, according to Microsoft.
This, according to Microsoft’s senior director of product management and planning at Xbox Albert Panello, is due to its use of a slot-loading disc drive.
"We don't support vertical orientation; do it at your own risk," he told GameSpot. "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 added: "We found, interestingly enough, that 80 per cent of people, believe it or not, have their Xbox  horizontally."
The site notes that both the original ‘fat’ PS3 and its first ‘slim’ redesign used slot-loading trays and were able to be used while standing vertically.