Under certain circumstances, you may encounter the block even though all the requirements seem to be met, here is a checklist of things to verify:
Make sure you are logged in as a domain administrator on the server where you are attempting the install. The
setup must be run while logged in to the domain with valid
domain credentials. The user needs to have domain administrator and local administrator rights.
Confirm the domain environment health, the verification process needs to be able to talk to all your domain controllers.
If using SBS, do not use the SBS console to count the number of computers and users, you will have to rely on what is showing in the native Active Directory Users and Computers mmc.
You can also enable verbose logging to get detailed output of which test is failing so you can take corrective action.
To enable verbose logging perform the following steps:
After you have experienced the block the first time, close the SQL setup.
Open notepad as an administrator and save the following contents:
Save the file in
%ProgramFiles%\Microsoft SQL Server\100\Setup Bootstrap\Release\x64\Setup100.exe.config
(if you are installing
SQL Server 2008 R2 for Small Business
the path will be:
%programfiles%\microsoft sql server\100\setup bootstrap\sqlserver2008r2\x64\Setup100.exe.config
Launch the SQL setup and run through to the block.
Collect the Verbose log from
%ProgramFiles%\Microsoft SQL Server\100\Setup Bootstrap\Release\x64\log.txt
%programfiles%\microsoft sql server\100\setup bootstrap\sqlserver2008r2\x64\log.txt