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Hi elit2007,<br />
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SQL Server SysPrep does not support side by side installation of prepared instances of SQL Server 2014 with earlier versions of SQL Server on the same computer. For example, you cannot prepare a SQL Server 2014 instance side by side with a prepared instance of SQL Server 2012. However, you can install multiple prepared instances of the same major version of SQL Server side by side on the same computer. For more information, see <a href="http://msdn.microsoft.com/en-us/library/ee210754.aspx" rel="ugc">Considerations for Installing SQL Server Using SysPrep</a> .<br />
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SQL Server 2014 cannot be installed side-by-side with earlier versions of SQL Server on a computer that is running Windows Server 2008 R2 Server Core SP1. For more information on Server Core installations, see <a href="http://msdn.microsoft.com/en-us/library/hh231669.aspx" rel="ugc">Install SQL Server 2014 on Server Core</a> .<br />
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From official MSDN
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Also, I saw Exsisting Instance of SQL Server 2014 support Side-by-side 2005 to 2014 both 32/64 bits. But I guess You will need to define major version and minor version.<br />
All in all, i think You will be able to configure them without any major problem, just pay attention to those things. *SysPrep<br />
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Thanks,<br />
D.
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The OS on the server is 2012. So it shouldn't be a problem as long as i run a manually installation?<br />
My concern was shared files. If SQL 2012 overwrite files that SQL 2014 already is using.
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Thanks a lot! I just have to hope that when I install SQL 2012, the installation program will see that the shared files have a newer version and not overwrite them. &nbsp;:)
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You are welcome. As what we saw from microsoft official site, it should not overwrite them, because they are newer than SQL 2012 shared files, but again to make yourself secured, backup files before start.<br />
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Regards,<br />
D.
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Hi!<br />
Will I face any problems when installing a 2012 SQL Standard instance on a server that is already running a 2014 SQL Standard instance?
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Hi!
Will I face any problems when installing a 2012 SQL Standard instance on a server that is already running a 2014 SQL Standard instance?

SQL instalation

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.