PTTFM-X467G-P7RH2-3Q6CG-4DMYB
数据中心版：PTTFM-X467G-P7RH2-3Q6CG-4DMYB 测试可用
开 发者 版：MC46H-JQR3C-2JRHY-XYRKY-QWPVM
企 业 版：R88PF-GMCFT-KM2KR-4R7GB-43K4B
标 准 版：B68Q6-KK2R7-89WGB-6Q9KR-QHFDW
工 作 组版：XQ4CB-VK9P3-4WYYH-4HQX3-K2R6Q
WEB 版：FP4P7-YKG22-WGRVK-MKGMX-V9MTM
SQL Server 2008 R2 Management Studio : “Evaluation period has expired”
How to change the key:
open installation disk, click setup, click maintenance on the ‘sql server installation center‘ wizard, click ‘Edition Upgrade‘ on the right of the wizard window.
To fix sql server 2008 r2 Evaluation period has expired by change the key
原文：http://www.cnblogs.com/zyip/p/3542714.html