It looks like there might be a typo in your request. Since Maya 2018 and Maya 2018.5 are actual versions, but "20185" is not, I have written a few options assuming you meant Maya 2018 or Maya 2018.5.

10. Plugin fails to load (error code 126 – missing DLL)

• Fix: Install Visual C++ Redistributables (all versions from 2012 to 2019).

  5. Saving scene takes >30 seconds

  • Fix: Clear undo history before save.

    7. Boolean operations fail or create non-manifold geometry

    • Fix: Use Mesh → Mesh Cleanup before boolean.

      Create a shelf button with this Python command:

      • Update 1 → Update 2 → Update 3 → Update 4 → Update 5 (Maya 2018.5).
      • Alternatively: Download the “Maya 2018.5 full installer” (some customers have access).

      : Fixed various causes of unexpected application crashes during scene manipulation and rendering. Performance Maintenance : Addressed issues related to laggy performance or freezing that users experienced after extended use. Interface Fixes : While some UI issues like the Outliner and Hypershade