Complex sentence: On the 15th of February 2007, Bethesda released a second patch, this patch performs some major repair work to the game engine, correcting numerous issues that caused access exception violations on most Windows PC system, as well as correcting memory leaks and graphic issues.
Split into simpler sentences: On the 15th of February 2007, Bethesda released a second patch. This patch performed some major repair work to the game engine, correcting numerous issues that caused access exception violations on most Windows PC systems, as well as correcting memory leaks and graphic issues.