Lost edit permissions of files (Access Denied, I know) after reinstalling your Windows? Copy this file to the folder where you want all the subfolders and files to be in your control again. Run it in PowerShell with administrator privileges, then delete or edit them again!

Fix-Windows-FileSystem-ACL.ps1

foreach ($file in Get-ChildItem . -Recurse)
{
   $path = Get-Item -LiteralPath $file.FullName
   $acl = $path.GetAccessControl()
   $permission = "Everyone","FullControl","Allow"
   $rule = New-Object System.Security.AccessControl.FileSystemAccessRule $permission
   $acl.SetAccessRule($rule)
   $path.SetAccessControl($acl)
}