If you want to format the C drive but you do not want to reinstall Windows immediately (or you are preparing the drive for a different operating system), you can use a System Repair Disc.
If you are formatting C drive to fix a virus, clear the computer to sell it, or start fresh, this is the standard method. You will need a and a valid Product Key.
This is normal. Windows prevents you from formatting the drive it is running on to protect the system from crashing. You must use one of the boot methods described above.
If your computer has a sticker on it with a Windows 7 Product Key, you can download a legal Windows 7 ISO image from Microsoft's website (or a trusted repository) and burn it to a DVD or USB using a tool like Rufus.
If you want to format the C drive but you do not want to reinstall Windows immediately (or you are preparing the drive for a different operating system), you can use a System Repair Disc.
If you are formatting C drive to fix a virus, clear the computer to sell it, or start fresh, this is the standard method. You will need a and a valid Product Key.
This is normal. Windows prevents you from formatting the drive it is running on to protect the system from crashing. You must use one of the boot methods described above.
If your computer has a sticker on it with a Windows 7 Product Key, you can download a legal Windows 7 ISO image from Microsoft's website (or a trusted repository) and burn it to a DVD or USB using a tool like Rufus.