Requested registry access is not allowed

If you are trying to register a new manage account in SharePoint 2013 and getting error

Application error when access /_admin/registeraccount.aspx, Error=Requested registry access is not allowed.  
 at Microsoft.Win32.RegistryKey.OpenSubKey(String name, Boolean writable)    
 at Microsoft.SharePoint.Administration.SPCredentialManager.GetMasterKey(SPFarm farm)    
 at Microsoft.SharePoint.Administration.SPCredentialManager.GetFarmEncryptionKey(SPFarm farm)    
 at Microsoft.SharePoint.Administration.SPCredentialManager.EncryptWithMasterKey(SecureString sstrPassphrase)    
 at Microsoft.SharePoint.Administration.SPEncryptedString.SetSecureStringValue(SecureString sstrValue)    
 at Microsoft.SharePoint.Administration.SPManagedAccount.Update()    
 at Microsoft.SharePoint.WebControls.RegisterAccountControl.BtnSubmit_Click(Object sender, EventArgs args)    
 at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)    
 at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)    
 at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)    
 at System.Web.UI.Page.ProcessRequest()    
 at System.Web.UI.Page.ProcessRequest(HttpContext context)    
 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()    
 at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Please make sure that apppool user of the central administrator have full access on the following location in registry.

HKLM\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\15.0\Secure\FarmAdmin