I get the following error message when I try to uninstall 2012 SP1. The repair and install also gives below error
Could not load type 'System.Xml.Xsl.Xslt.XslVersion' from assembly 'System.Data.SqlXml, Version=220.127.116.11, Culture=neutral, PublicKeyToken=' due to value type mismatch
Any thoughts? Thanks
Please make sure a domain policy is preventing the Windows account you are using to run SQL Server setup from having one or more of the user rights described on the following support article:
Could try to download again SP1?
Hope this helps.
- Proposed as answer by Neha Mahajan DBA Friday, February 07, 2014 3:08 AM
Hi Shiva Gangadhar,
According to your description, if you want to uninstall SQL Server 2012 SP1 completely, you need to note that the service pack makes changes to the system tables for maintenance reasons, and upgrades user and distribution databases that are members of a replication topology. Due to these changes, you cannot easily remove service packs. There is no automated way to remove a service pack, and the process of removing a service pack involves several manual steps and risks if not done correctly.
There are more details about how to remove a SQL Server Service Pack and uninstall SQL Server instance completely.
TechNet Community Support