Instability in SOLIDWORKS due to conflict with Microsoft KB3072630. There is a conflict with Microsoft KB3072630 (published July 14 2015) which can cause SOLIDWORKS to become unstable when installed or updated after KB3072630 is applied. The Microsoft update makes changes to Windows Installer which prevents SOLIDWORKS installations (new, modify/repair, update or uninstall) from being executed correctly. We are working diligently to produce a software fix as soon as possible in SOLIDWORKS 2015 and 2016, however in the interim please review the information below to prevent and correct instability caused by this conflict.