Fix problems that block programs from being installed or removed
The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys. First, you'll need to download the troubleshooter.
KB2861939 - FIX: Cannot uninstall, repair, add new features to, or add ...
Fixes an issue in which you cannot uninstall, repair, add new features to, or add a new instance to SQL Server 2008 or SQL Server 2008 R2 on Windows 8. This issue occurs when the computer does not have the .NET Framework 3.5 installed.
Uninstall or remove apps and programs in Windows
Press and hold (or right-click) on the app, then select Uninstall. Uninstall from the Settings page. Select Start , then select Settings > Apps > Apps & features. Select the app you want to remove, and then select Uninstall. Uninstall from the Control Panel (for programs)
KB2688964 - FIX: Error message when you use the SQL Server 2012 ...
You use the SQL Server 2012 installation media to try to uninstall the features of an instance of SQL Server 2012. For example, you take one of the following actions to uninstall SQL Server 2012: You use the Uninstall a program item in Control Panel.
KB4022619 - SQL Server 2014 Service Pack 3 release information
Uninstalling SQL Server 2014 SP3 (not recommended) If , for any reason , you choose to uninstall SQL Server 2014 SP3, the uninstallation of SQL Server 2014 SP3 will not be blocked, and you will be able to uninstall SQL Server 2014 SP3 in the same manner as any other service packs.
KB3011867 - SQL Server in-place upgrade fails if the there's no JOBS ...
Next, uninstall SQL Server by using the following command line: setup /q /action=uninstall /instanceid=ProdSQL /features=SQLENGINE,FULLTEXT,REPLICATION Then, run SQL Server Setup again. Open a command prompt, and then locate the directory that contains the upgrade setup media.
Fix problems that block programs from being installed or removed
The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys. First, you'll need to download the troubleshooter.
KB3189033 - FIX: Cannot uninstall service packs for SQL Server 2014 ...
Fixes an issue in which you can't uninstall service packs for SQL Server 2014 after a cumulative update is installed.
You cannot add or remove features to a SQL Server 2008, SQL Server 2008 ...
If you need to add or remove features to an existing installation, you must reinstall the virtual instance with the required features. For additional information, you can refer to the following topics in SQL Server Books Online: How to: Remove a SQL Server Failover Cluster Instance (Setup) How to: Create a New SQL Server Failover Cluster (Setup)
KB2688967 - FIX: Progress bar freezes for a long time when you install ...
Fixes an issue in which the progress bar freezes for a long time when you install or uninstall a hotfix package for SQL Server 2012.