: Some users reported that installing Update 4 brought Step 7 back to a "normal" speed, making it much more stable for daily use.

: It offers improved compatibility for the STEP 7 Safety Basic V13 SP1 license, resolving activation headaches for many users.

: New optimized versions of fail-safe instructions (TP, TOF, TON, ESTOP1, and FDBACK) were added to improve stability and reduce memory consumption on the PLC. 3. Stability and Bug Fixes

A primary reason to choose Update 4 over previous updates is its —it includes all fixes from Updates 1, 2, and 3.