July 8, 2025-KB5056580 Cumulative Update for . NET Framework 3. 5 and 4. 8 . . . The April 22, 2025 update for Windows 11, version 22H2 and Windows 11, version 23H2 includes security and cumulative reliability improvements in NET Framework 3 5 and 4 8 1 We recommend that you apply this update as part of your regular maintenance routines Before you install this update, see the Prerequisites and Restart requirement sections