WIndows 11 Pro Black Screen Update

What you describe should be treated as possible unauthorized remote access, not assumed to be a normal Windows Update. A moving pointer and unexpected banking code do not prove the cause, but justify immediate containment. Disconnect Ethernet and Wi-Fi, stop using the PC for banking, and call the bank through its official number to review sessions and transactions. From another trusted device, change Microsoft, email, and financial passwords, revoke active sessions, and enable multifactor authentication. On the PC, check Settings > Apps and Task Manager > Startup for remote-support software you did not install, then update Windows Security and run Microsoft Defender Offline. Preserve screenshots and times, and review Protection history and Event Viewer. A VPN does not prevent remote-control malware. If access is confirmed or unexplained activity continues, back up personal documents only, reset or clean-install Windows, and involve Microsoft Support or a qualified incident responder.