Steps
Start your Windows PowerShell on your computer.
Right click and select Run as administrator option.

Paste the below script on the PowerShell window and click the enter button.

Check your SharePoint site Feature will activate successfully.

Syntax Explanation

Delete-SPGroup "http://gowtham.sharepoint.com/teams/tutorials" "SharePointOwners"

This example deletes SharePoint group "SharePointOwners" at the given site collection
  1. Code:
  3. Function Delete-SPGroup()
  4. {
  6. [CmdletBinding()]
  7. Param(
  8. [Parameter(Mandatory=$true)][string]$SiteURL,
  9. [Parameter(Mandatory=$true)]$GroupName
  11. )
  13. #Get the rootweb
  14. $web = Get-SPWeb $SiteURL
  16. #group already exists
  17. if($Web.SiteGroups[$GroupName] -ne $null)
  18. {
  19. #remove sharepoint group using powershell
  20. $web.SiteGroups.Remove($GroupName)
  21. $web.Update()
  23. Write-Host "Group Deleted!"
  24. }
  25. else
  26. {
  27. Write-Host "Group doesn't Exists!"
  28. }
  29. $web.Dispose()
  30. }
  31. Delete-SPGroup()