Windows 2008 R2 pre-release upgrade to the official version of

patching found that can not be installed successfully found that the installation version is Windows2008 R2 pre-release. To solve this problem, you can use two methods: 1. Reinstall the official version 2. Upgrade. However, if reloading, the impact is relatively large, the application should be shut down, and the application configuration should be reinstalled after the installation, the workload is very large. Therefore, the upgrade is a better method, only a little maintenance downtime is required. After the upgrade is completed, the application can be used normally (before the upgrade, you must test it first and have a rollback solution.)
The specific upgrade steps are as follows: 2008 R2 ISO, open the minimum installation version of cversion.ini in sources\\cversion.ini, the default is 7601.0, so can not be installed on pre-release, change it to 7100.0, then load the secondary ISO into the virtual machine, select upgrade Installation is fine. Win7 RC to the official version can also use the same method reference: How to Upgrade the Windows 7 RC to RTM (Final Release): http://www.howtogeek.com/howto/3075/how-to-upgrade-the-windows- 7-rc-to-rtm/