We are getting the following error when trying to install SQL Server (2005 and 2008) software on a Windows Server 2008 R2 Enterprise machine:
"The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or if the Windows Installer in not correctly installed. Contact you support personnel for assistance."
We had installed SQL Server 2005 previously, but are now trying to install other components from the SQL Server installation materials. We get the same error with the SQL Server 2005 and 2008 installers.
In our reasearch we've found references to corrupt or missing files and incorrect registry entries, and from the advice in those posts we have:
- Reregistered msi.dll
- Reregistered msiexec.exe
- Checked that the image path registry setting is correct
- Compared MD5 values for msi.dll and misexec.exe to those from a functioning server.
- imported registry settings from; Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msisrver, from a properly functioning server
but have not been able to correct the issue.