No, while operating systems do have to be compiled/tailored for particular CPU architectures, most modern Operating systems are available for all modern CPU chips.
Any problems with compatibility are usually more related to device drivers for devices connected to the CPU's motherboard than the type of processor.
The fact that desk tops and laptops come with Microsoft OS pre-installed is a marketing con. You are being forced to pay Microsoft a fee for MS Windows as part of the purchase when you could save that money and install a free operating system such a Linux (Ubuntu - see related link below) which works just as well a Windows.
True
yes
Platform
The Operating System
You cannot run Vista (or an other operating system) on a computer that has no processor.
platform
The processor is the one that coordinates the flow of data and information through the computer system. This is also facilitated by RAM and software interface among other essential components.
Kernal
in the registers ,the closest memory to the central processor unit.
The operating system communicates with computer hardware using small programs called drivers.
hard drive, memory, operating system, screen, processor and etc
Processor based virtualization is when a processor in a computer is able to create a virtual operating system on which to use certain softwares and other useful devices on the computer. One of the more prominent companies that works with processor virtualization is AMD.