Uninstalling from SharePoint Central Administration

NOTE: You need to be a machine administrator in order to Retract and remove a solution via Central Administration.

Step	Action
1.	In SharePoint Central Administration, go to the Manage Farm Solutions page (its called Solution Management in SharePoint 2007). In SP2010, click System Settings > Manage Farm Solutions. In SP2007, click Operations > Solution Management.
2.	Solutions are listed alphabetically. Find the solution you need to uninstall and click its Name. The solution status will be displayed. NOTE: The image below is from SharePoint 2010, but solution status from SP2007 and SP2013 look very similar. If the solution is deployed, you will see a Retract Solution link at the top of the page. If the solution is not deployed, you will see a Remove Solution link.
3.	Retract the solution from all web applications. Choose to retract now, or schedule it to occur at a particular time. Choose to retract from All content Web applications. Click OK when ready. NOTE: IF you are not a machine administrator, you may see an Access denied error. Make sure you have the appropriate permission level before attempting to retract a solution.
4.	Remove the solution. Once a solution has been retracted, the Remove Solution link is shown. Click Remove Solution to remove the solution.