How to Change Product Key in Windows 10
Windows 10 requires activation to verify you're running a genuine copy. For that purpose, a special product key is used to verify that a licensed copy of Windows 10 isn't being used on more devices than it is allowed by Microsoft.
How to Install Windows 10 Version 1909 Without Microsoft Account
Windows version 1909, the latest Windows 10 version as of today, forces the user to install it using a Microsoft Account. The changes to OOBE include the removal of the "Offline account" feature. Here is make Windows 10 version 1909 offer you the offline account option and install it with a local account.
Get Generic Keys to Install Windows 10 version 1909 November 2019 Update
There are often times when you need to install Windows 10 evaluation or testing in a virtual machine or on a lab PC. You may not want to activate it every time with your licensed product key that you use on a production or home PC. In that case, you can use generic keys for Windows 10 available from Microsoft, which will allow you to install the OS, but won't allow you to activate it. As long as you have an ISO image or any other bootable media containing Windows Setup files you can install the OS using a generic key.
How To Hide The System Recovery Drive Partition in Windows 10
The Recovery partition is a special partition on the hard drive that exists on almost all OEM Windows computers. It’s created by the OEM vendors and is used for to keep OS image that these days replaces the recovery discs that used to come with new computers. If you are using an OEM computer, such as ones you bought from Dell, HP, etc., you will have a special partition available on the drive of your new computer.
These days most PCs can boot from USB, so you need no DVD drive any more to install Windows 10. Installing Windows 10 from a USB flash drive is much faster than optical drive setup. Modern devices support both BIOS or UEFI firmware modes. However, it can be useful to create a bootable USB driver which works in native UEFI mode.
In Windows 10, Microsoft Account is the default way of signing in. This means that the OS requires your Outlook.com, Hotmail, MSN, or Live ID email address and password to sign-in to Windows. It is still possible to sign in using a local account that does not involve internet-based credentials, but the option to do so is hidden behind various buttons.