Windows 11 Pro is available for purchase at a discounted price through StackSocial, using the code UPGRADE at checkout. The standard price from Microsoft is 9, while StackSocial's offer provides significant savings. The operating system includes features such as BitLocker device encryption, Azure-AD integration, and Hyper-V virtualization. Customers receive a lifetime license upon purchase, but the download code must be redeemed within 30 days. Users should ensure their hardware meets the minimum system requirements for installation.