I believe you are trying to install 64 bit SQL Server on 32 bit desktop. Please Download 32 bit installation files.
Also check
Hardware and Software Requirements for Installing SQL Server 2012
Windows 7, Windows Server 2008 R2, Windows Server 2008 Service Pack 2, Windows Vista Service Pack 2
-
32-bit systems
- Computer with Intel or compatible 1GHz or faster processor (2 GHz or faster is recommended.)
- Proposed as answer by Lydia ZhangMicrosoft contingent staff, Moderator 5 hours 13 minutes ago
In Add/Remove Programs, click "Microsoft SQL Server 2012 Setup" and click Repair.
http://www.sqlservercentral.com/Forums/Topic1424017-2799-1.aspx
https://connect.microsoft.com/SQLServer/feedback/details/675311/misleading-error-message-when-installing-sql-server-08-r2-express-on-win7-with-sql-already-installed-in-winxp-mode
Hi debian113,
Firstly, please review the
Hardware and Software Requirements for Installing SQL Server 2012 to select the right edition of SQL Server 2012 for your machine. Also note that Windows 7 should be applied Service Pack 1 to install SQL Server 2012.
Secondly, make sure that SQL Server installation media is not corrupted, you can verify the installation media by using the
Microsoft File Checksum Integrity Verifier tool.
Thirdly, if you download ISO, please extract it and make sure all the extracted files are placed on local disk, then run setup.exe from there.
Thanks,
Lydia Zhang