背景介绍：
一台服务器装的是Windows Server 2012 R2数据中心版操作系统，服务器拥有64G内存。
由于部分软件兼容问题，重装了Windows 2008系统，结果错误装成了标准版系统。在物理上已增加了内存的情况下,标准版系统最多只能识别32G，这个时候需要将Windows Server 2008 R2标准版操作系统升级到企业版。
升级前：
Windows 2008 Standard R2
升级步骤：
1、获取当前操作系统版本信息
dism /online /Get-CurrentEdition
2、检查当前操作系统可升级的版本
dism /online /Get-TargetEditions
3、输入操作系统升级命令，目标版本和序列号。安装完成后第1次重启系统
dism /online /Set-Edition:ServerEnterprise /productkey:489J6-VHDMP-X63PK-3K798-CPX3Y
输入Y重启计算机
4、重启完成后，登录操作检查操作系统的版本、系统激活状态。
至此，Windows 2008 R2标准版到企业版的操作系统升级完成。
Windows2012升级命令参考：
dism /online /set-edition:ServerDatacenter /productkey:48HP8-DN98B-MYWDG-T2DCC-8W83P /AcceptEula版权属于: 三三世界-百宝箱
本文链接: http://33f.net/windows/windows2008_standard_upgrade_to_EnterPrise.html
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