It was not an x86 architecture, and would have required an emulator to run x86 Windows 7. I also never owned one.
https://en.m.wikipedia.org/wiki/Xbox_360
Windows NT 4 had a POWER port. This was discontinued when Windows 2000 arrived. If Microsoft wanted to release another version for POWER, they could easily do so.
https://en.m.wikipedia.org/wiki/Windows_NT
"Windows NT 3.51 added support for the PowerPC processor in 1995, specifically PReP-compliant systems such as the IBM ThinkPad Power Series laptops and Motorola PowerStack series; but despite meetings between Michael Spindler and Bill Gates, not on the Power Macintosh as the PReP compliant Power Macintosh project failed to ship."
https://en.wikipedia.org/wiki/Cell_(processor)
For the next generation of consoles, AMD's integration of ATI graphics onto a single die CPU/GPU/APU proved irresistible, and both Sony and Xbox switched to AMD x86 variants. The Nintendo Switch adopted the Nvidia Tegra ARM architecure.
IBM essentially had one generation of consoles. I don't know why they didn't fight harder for this market.
You are probably thinking of that.
But it's all malware nevertheless and with each new version you can expect it to become more aggressive (e.g.: Pluto).