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Note the following important scenarios before you uninstall SQLServer:.Before you remove SQL Server components from a computer that has the minimum required amount of physical memory, make sure that thepage file size is sufficient. The page file size must be equal to twotimes the amount of physical memory. Insufficient virtual memory cancause an incomplete removal of SQL Server.If you have multiple instances of SQL Server, the SQL Server Browser uninstalls automatically when the last instance of SQL Server2016 is uninstalled.If you want to uninstall all components of SQL Server 2016, you mustuninstall the SQL Server Browser component manually from Programs andFeatures in Control Panel.Also note that,Before You Uninstall:.Delete the local security groups.

In Windows Server 2012 R2, the option to remove Roles and Features is a bit obscure, or at least not where you might look initially. First, launch Server Manager from the Start menu. Now, you can find Remove Roles and Features from the Manage menu along the top navigation options. From the Remove Roles and Features dialog, simply select the packages you would like to remove and proceed through the removal wizard.

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Before you uninstall SQL Server, delete the local security groups for SQL Server components.Stop all SQL Server services. We recommend that you stop all SQL Server services before you uninstall SQL Server components. Activeconnections can prevent successful uninstallation.Use an account that has the appropriate permissions. Log on to the server by using the SQL Server service account or by using an accountthat has equivalent permissions. For example, you can log on to theserver by using an account that is a member of the localAdministrators group.Documentation.

Specifies a user account that has access rights to perform this action.If the parameter is not added, or no value is specified, the default value of this parameter is the current user.Enter a user name in one of the following formats.Quotation marks are optional.- 'UserName'- 'DomainUser'- 'User@Domain.com'- A Credential object returned by the Get-Credentialcmdlet.If a user name is entered, then a prompt for a password is displayed. Type:PSCredentialPosition:NamedDefault value:NoneAccept pipeline input:FalseAccept wildcard characters:False. Deletes feature files for the specified rrsandfplural from the side-by-side store, located at%SystemDrive%:WindowsWinSxS.If the feature is not yet uninstalled, the command uninstalls the feature.When you delete feature files, features that depend upon the files you remove are also deleted.When you delete feature files for a subfeature, and no other subfeatures for the parent feature are installed, then files for the entire parent role or feature are deleted. Type:SwitchParameterPosition:NamedDefault value:NoneAccept pipeline input:FalseAccept wildcard characters:False.