The question is a bit vague. You need to specifiy what you are trying to do and what operating system you are using. For instance, if you are at a command prompt in DOS or Windows you could type in FORMAT C: /S and the drive designated by the C: (c drive) would be formatted and bootable system files would be added (/S). Please be more specific when you re-ask your question.
you can format your drive from DOS, but once you do that you wont have an operating system and your computer will be useless.
If your Windows operating system is not installed on drive C, you can simply format using the inbuilt formatting tool. Otherwise, you need to boot your computer using an operating system on different drive to format C.
If you want to format a hard drive where Os was installed there is no way how you can do. It's actually impossible.
Format drive C
yes you do.
I'm not sure what you mean. But if you mean that you want to format a hard drive or partion which is not a system file disk/partion. Then it's really easy to do. Start My Computer, right click on the hard drive/partion which you want to format and choose format, then choose file system which you prefer to format, and press ok/start.
No, XP will format the disk if that's needed.
Format the drive and install a new operating system in its place.
The command used to format a drive is "Format".
format
After the USB drive has been inserted, it will be assigned a drive letter. From this point, you would open the CMD prompt and type: FORMAT F: (enter) Be sure to replace F: with the thumb drive's drive letter which is assigned by your operating system. If you format the wrong drive letter, you will lose all the data stored on that drive letter.
You cannot format the drive / partition that Windows Vista is currently running on while it is running. You will need to boot from either a partition utility disc, such as GParted, or the install disc of the operating system you want to install, and format the drive from there.