Virtual labs - in simple words its simple to use where a pre-installed environment is setup to try out /test SQL Server installation for your databses upgrade, that has full-featured labs. Not only this you have an option to download manual with a 90-minute block for each module if you are not sure enough. All you have to do is sign-up (free) on Technet center. I would encourage many of you out there to try them at your own time, even though you are experienced or have access to setup whatever type...(
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Read the complete post at http://sqlserver-qa.net/blogs/tools/archive/2007/10/05/sql-server-virtual-labs-fully-featured-virtual-environment-for-testing.aspx