Removing/Resetting Window XP Administrator password

EASIEST WAY TO RESET YOUR LOST PASSWORD IN WINDOWS XP

There are two methods to remove/reset the lost password of your PC in Windows XP e.g.

(i) By Parallel Windows installation.
(ii) By Using Password recovery CD.

By Parallel Windows installation
If you have lost your Windows XP Administrator’s Password and the only login User was Administrator on your computer’s Windows XP then Following is the Procedure to remove password for getting Access to your Computer:

1. First of all take another Hard Disk and install fresh Windows XP on it.
2. Place that new Hard Disk in the PC which contains the Windows XP which is locked.
3. Now start your Computer and Boot from the new Hard Disk (Fresh Windows XP)
4. Go to the Drive on which Locked Windows was installed.
5. Go to WINDOWS -> system32 -> config folder.
6. From config folder DELETE the file named SAM.
7. Then again go to WINDOWS -> repair folder.
8. From repair folder, copy SAM (and if SAM.Log file exists) file and paste the file (s) into WINDOWS -> system32 -> config folder.
9. You have removed your old Windows Password. (Hurrah!!!)

By Using Password recovery CD

1. Go to your Computer’s Boot Sequence change the boot from hard derives to CD.
2. Place Password Recover CD into your CD Rom.
3. Boot from CD and their will be set to recover/reset Password Setup.
4. Change your PC’s Password.

Creating Single instance of a windows Form

//Following Code in Child form Class 

//creating form's object.
public static volatile System_Categorization singleObj;

        
// Function in the Form
public static System_Categorization singleInstance()
 {
 if (singleObj == null)
  {
    lock (typeof(System_Categorization))
     {
       if (singleObj == null)
        {
          singleObj = new System_Categorization();
        }
     }
  }
return singleObj;
}

//On Disposing please Please Write following code in Designer class 

protected override void Dispose(bool disposing)
 {
   //mainform objmainform = new mainform();
            
     if (disposing && (components != null))
       {
         components.Dispose();
       }
       base.Dispose(disposing);
     singleObj = null;
           
 }

//Following Code in Parent form Class 

// Now open the form as write code in Parent Form

 //System_Categorization objForm = new System_Categorization();

System_Categorization.singleInstance().Show(); 

Creating Single Instance of Your Application

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Threading;

namespace myappliaction
{
    static class Program
    {
        /// 

        /// The main entry point for the application.
        /// 
        [STAThread]
        static void Main()
        {
            bool createdNew = true;
            using (Mutex mutex = new Mutex(true, "myappliaction", out createdNew))
            {

                try
                {
                    if (createdNew)
                    {
                        Application.EnableVisualStyles();
                        Application.SetCompatibleTextRenderingDefault(false);
                        Application.Run(new mainform());
                    }
                    else
                    {
                        MessageBox.Show("Application is already running.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                        //Process current = Process.GetCurrentProcess();
                        //foreach (Process process in Process.GetProcessesByName(current.ProcessName))
                        //{
                        //    if (process.Id != current.Id)
                        //    {
                        //        SetForegroundWindow(process.MainWindowHandle);
                        //        break;
                        //    }
                        //}
                    }
                }
                catch (Exception exception)
                {
                    MessageBox.Show(exception.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                }
            }
        }
    }
}

Drawing Pie Chart

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DrawingPieShapes
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btn_show_Click(object sender, EventArgs e)
        {
            // Create a Graphics object
            Graphics g = this.CreateGraphics();
            g.Clear(this.BackColor);

            // get the current value of start and sweep angles
            float startAngle = (float)Convert.ToDouble(textBox1.Text);
            float sweepAngle = (float)Convert.ToDouble(textBox2.Text);

            // Create a pen
            Pen writePen = new Pen(Color.Blue, 1);

            // Draw pie
            g.DrawPie(writePen, 20, 20, 100, 100, startAngle, sweepAngle);

            // dispose of objects
            writePen .Dispose();
            g.Dispose();
        }
    }
}

Getting Computer Names from Domain using C#

ArrayList ALExist = new ArrayList();
ArrayList AL = new ArrayList();
DataTable dt_Domainsystem_withIP = new DataTable();



public void get_computername()
{
   //Invoke(new MyDelegate(ShowProgressBar), false);
   //string server = ""; //Insert Domain controller server here
   string server = Environment.UserDomainName; //Insert Domain controller server here
   string adminUser = Environment.UserDomainName + Environment.UserName;//Insert an admin user account here
   //string adminUser = ""; 
    string adminPass = ""; //Password for above username
    DirectoryEntry de = new DirectoryEntry();
    de.Path = "LDAP://" + server + "";
    de.Username = adminUser;
    de.Password = adminPass;
            

    try
    {
                float progress = 0;
                DirectorySearcher ser = new DirectorySearcher();
                ser.Filter = "(&ObjectCategory=computer)"; //Only allows Computers to be returned in results.
                SearchResultCollection results = ser.FindAll();
                foreach (SearchResult res in results)
                {
                    string[] temp = res.Path.Split(','); //temp[0] would contain the computer name ex: cn=computerName,..
                    AL.Add(temp[0].Substring(10).ToString());//returns everything after LDAP://CN= until end of temp[0].
                }
                //c1_doaminSystems.DataSource = AL;
                //c1_doaminSystems.Rebind(true);
                //DataSet ds = new DataSet();

                AL.Sort();
                lbl_total_domain.Text = AL.Count.ToString();
                
                try
                {
                    dt_Domainsystem_withIP.Columns.Add("Computer Name", typeof(string));
                    dt_Domainsystem_withIP.Columns.Add("IP Address", typeof(string));
                }
                catch (Exception ex)
                { }



                for (int i = 0; i < AL.Count; i++)
                {

                    dr = dt_Domainsystem_withIP.NewRow();
                    dr[0] = AL[i].ToString();

                    try
                    {
                        IPAddress[] addresslist = Dns.GetHostAddresses(AL[i].ToString());
                        foreach (IPAddress theaddress in addresslist)
                        {
                            dr[1] = theaddress.ToString();
                        }
                        ALExist.Add(AL[i].ToString());
                    }
                    catch (Exception ex)
                    {
                        //ALIPException.Add(AL[i].ToString());
                        dr[1] = ex.Message.ToString();
                    }


                    dt_Domainsystem_withIP.Rows.Add(dr);
                    float divide = (float) i / AL.Count;
                    progress = (divide*100);

                    int total_progess = (int)progress;

                    if (total_progess % 2 == 0)
                    {
                        lbl_progress.Text = total_progess.ToString() + "% Complete..";
                    }
                    else
                        lbl_progress.Text = total_progess.ToString() + "% Complete....";


                }
                Grid.DataSource = dt_Domainsystem_withIP;
                Grid.Rebind(true);
                
                


                








            }

            catch (Exception ex)
            {

               // Console.WriteLine(ex.ToString());

            }

            finally
            {

                de.Dispose();//Clean up resources

            }



        }