Microsoft has released a Microsoft security advisory about this issue for IT professionals. The security advisory contains additional security-related information. To view the security advisory, visit the following Microsoft website: http://www.microsoft.com/technet/security/advisory/2269637.mspx Microsoft has released new API enhancements for Windows to help developers correctly and securely load external libraries. For more information, visit the following Microsoft webpages: [SetDefaultDllDirectories](http://msdn.microsoft.com/en-us/library/hh310515(VS.85).aspx) [AddDllDirectory](http://msdn.microsoft.com/en-us/library/hh310513(VS.85).aspx) [RemoveDllDirectory](http://msdn.microsoft.com/en-us/library/hh310514(VS.85).aspx) This update is required for .NET Core on Windows 7 or Windows Server 2008 R2. Note: KB2533623 is no longer available for download from Microsoft. This package now redirects to a later update, KB3063858, which supersedes it.