when "minute"
    if username == nil
      execmd = "schtasks /create /tn \"#{taskname}\" /tr \"#{cmd}\"  /sc minute /mo #{tmmod} /ru system"
    else
      execmd = "schtasks /create /tn \"#{taskname}\" /tr \"#{cmd}\"  /sc minute /mo #{tmmod} /ru system /u #{username} /p #{password}"