Installing SQL Server 2012 error “The system cannot open the device or file specified.”
问题 I am trying to install SQL Server 2012 Developer on my machine which already has SQL Server 2008 R2 Express with Windows 7. I used Microsoft Secure Download Manager for downloading installer and it automatically convert installer file to ISO file. I am using WinRAR to unzip the ISO file and running setup on installation I got below error message: Unable to open Windows Installer file 'C:\SQLSErverInstaller\x64\setup\sql_engine_core_inst_msi\sql_engine_core_inst.msi'. Windows Installer error