Windows doesn't have CMOS settings. The CMOS (aka BIOS) is built into the computer itself, and it isn't until after the computer loads the BIOS that it boots the operating system (e.g., Windows).
But to get into the CMOS, you fire up your computer or reboot it, but before it starts loading up Windows you need to press the magic key that opens the BIOS. Which key is that? Sadly it depends on the manufacturer and sometimes the model. For HPs it seems to be usually F10; for Dells I think it's F2. For machines with ASUS motherboards, it's often Del. For others it might be Ins. Fortunately most computers will tell you: during the period when they're listening to see if you want to get into the BIOS, they'll say something like "Press F2 to open Setup". That tells you which key you need to press.
No. Only the BIOS settings and password are stored in the battery-backed CMOS memory. Windows passwords are stored in the Windows registry, in a file on your hard disk.
The CMOS remembers the time and date settings of the computer, and also remembers the Hardware settings.
CMOS settings are altered by the BIOS program while in setup mode.
boot order
boot order
CMOS or BIOS configuration settings
These settings are stored in the computer's BIOS. Sometimes it is also referred to as CMOS.
If the CMOS battery dies you lose the settings that are held in the BIOS (Basic Input Output System). These include settings such as date/time, boot order,etc.
CMOS battery
Current date and time
Data stored in CMOS can be altered using a CMOS editor program. CMOS commonly stores the computer's BIOS and its content can be changed using the inbuilt BIOS settings utility.
Its is the button battery that stores the BIOS settings for your computer.