<p>What are the main features and advantages of Windows 8.1 Professional?<br /><strong>Domain Join</strong> – Connect PCs to Active Directory for central control.<br /><strong>BitLocker Drive</strong> – Full-disk encryption keeps laptops and drives protected.<br /><strong>Remote Desktop</strong> – Host secure remote sessions for support and work.<br /><strong>Hyper-V Virtualization</strong> – Run virtual machines for testing and training.<br /><strong>Group Policy</strong> – Enforce settings consistently across business PCs.<br /><strong>File Encryption</strong> – Encrypt individual files for shared-device privacy.</p>