Microsoft officially ends support for Windows Server 2003 on July 14, 2015. The deadline has some of the same ramifications that the Windows XP deadline had: Microsoft will no longer patch Windows Server 2003 for new security vulnerabilities. Presumably, Microsoft will offer expensive Custom Support Agreements for enterprises to continue getting patch support after that date, but there’s been no official announcement yet. In the meantime, new security vulnerabilities keep cropping up for the aging OS. During the last full year, 2013, Microsoft released 37 critical updates for Windows Server 2003.