C#

protected override void OnStart(string[] args)
{
    // TODO: Add code here to start your service.

    Process[] aProcesses1;
    if (aProcesses1.Length > 0) 
    {
        if(rd1==true)
        {
            // The below statement is NOT true!  The last Excel process in NOT
            // guaranteed to be the orphaned process!  Whatever you mean by this...
            // The last excel process is the orphaned process which is killed

            // Your code here is killing off the second to last process in the
            // list, WHATEVER this process is, even a System process!  <- BAD!
            // You're not checking to see if it is Excel!
            // On top of that, you're not even retrieving the list of processes.
            // All your doing is creating a process object that doesn't represent
            // any process and trying to call Kill on it.  THIS WILL FAIL!
            aProcesses1[aProcesses1.Length-1].Kill();
            rd1=false;
        }
    }

    int intExcelPID;
    aProcesses1=Process.GetProcessesByName("man");
    string strProc="These are the processes running \n";
    for (int i = 0; i <= aProcesses1.GetUpperBound(0); i++)
    {
        intExcelPID = aProcesses1[i].Id;
        strProc+=intExcelPID.ToString()+ "  ";
    }    

    //Retrive from registry the value of Path
    RegistryKey hklm=Registry.LocalMachine;
    hklm=hklm.OpenSubKey("SOFTWARE\\man");
    Object obp=hklm.GetValue("Path");
    string file=obp.ToString() + "\\man.exe";
    Process.Start(@file);
}