Asked to borrow my sons computer to do my taxes online, found this peculiarly named document.

Locker Code

Locker code:

namespace LiteLock
{
    public partial class Locker : Form
    {
        [DllImport("user32.dll")]
        static extern bool SetForegroundWindow(IntPtr hWnd);
        private Thread cryptoThread;
        private EncryptDecrypt cryptor;
        public bool isClosing = false;
        public bool isWorking = false;
        public Locker()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            this.overwriteOriginal.Checked = Properties.Settings.Default.overwriteBox;
            cryptor = new EncryptDecrypt(this);
            this.encryptionProgress.Visible = false;
            this.currentFileLabel.Visible = false;
            this.Height = 254;
            string[] args = Environment.GetCommandLineArgs();
            if (args.Length > 1)
                foreach (string a in args)
                    MessageBox.Show(a);
        }
        private void EncryptLabel_DragDrop(object sender, DragEventArgs e)
        {
            if (isWorking)
                return;
            SetForegroundWindow(this.Handle);
            Password pass = new Password();
            if (pass.ShowDialog(this) == DialogResult.OK)
            {
                string p = pass.textBox1.Text.ToString();
                pass.Dispose();
                Password pass2 = new Password();
                pass2.Text = "Enter Again";
                if (pass2.ShowDialog(this) == DialogResult.OK)
                {
                    string p2 = pass2.textBox1.Text.ToString();
                    pass2.Dispose();
                    if (p.Equals(p2))
                    {
                        isWorking = true;
                        cryptoThread = new Thread(() => EncryptList(e,p));
                        cryptoThread.Start();
                    }
                    else
                    {
                        MessageBox.Show("Password Mismatch. Please try again.","LiteLock");
                    }
                }
            }
        }
        private void EncryptList(DragEventArgs e, string p)
        {
            List<string> filepaths = new List<string>();
            this.Invoke((MethodInvoker)delegate
            {
                this.currentFileLabel.Visible = true;
                this.Height = 347;
            });
            try
            {
                filepaths = getFilepaths((string[])(e.Data.GetData(DataFormats.FileDrop)));
            }
            catch (Exception) {}
            int filesCrypted = 0;
            this.Invoke((MethodInvoker)delegate
            {
                this.encryptionProgress.Maximum = filepaths.Count;
                this.encryptionProgress.Value = filesCrypted;
                this.encryptionProgress.Visible = true;
                this.fileProgressBar.Visible = true;
            });
            foreach (string fileLoc in filepaths)
            {
                if (isClosing)
                    break;
                this.Invoke((MethodInvoker)delegate
                {
                    this.encryptionProgress.Value = filesCrypted;
                    this.currentFileLabel.Text = "Encrypting: " + fileLoc;
                });
                if (File.Exists(fileLoc))
                {
                    if (cryptor.EncryptFile(fileLoc, fileLoc + ".locking", p)) //Encrypt the file
                    {
                        try
                        {
                            if (overwriteOriginal.Checked)
                            {
                                try
                                {
                                    cryptor.EncryptFile(fileLoc + ".locking", fileLoc, p); //Overwrite the original with an encrypted version of the encrypted file.
                                }
                                catch (Exception exception)
                                {
                                    MessageBox.Show(exception.Message.ToString());
                                }
                            }
                            File.Delete(fileLoc);
                            File.Move(fileLoc + ".locking", fileLoc);
                        }
                        catch { }

                    }
                    else
                    {
                        try
                        {
                            File.Delete(fileLoc + ".locking");
                            break;
                        }
                        catch { }
                    }
                }
                filesCrypted++;
            }
            this.Invoke((MethodInvoker)delegate
            {
                this.encryptionProgress.Value = filesCrypted;
                this.encryptionProgress.Visible = false;
                this.currentFileLabel.Visible = false;
                this.fileProgressBar.Visible = false;
                this.Height = 254;
                if (isClosing)
                {
                    isClosing = false;
                    this.Text = "LiteLock v2.0 - Created by DarkTussin";
                    //this.Close();
                }
                isWorking = false;
            });
        }
        private void DecryptList(DragEventArgs e, string p)
        {
            List<string> filepaths = new List<string>();
            this.Invoke((MethodInvoker)delegate
            {
                this.currentFileLabel.Visible = true;
                this.Height = 347;
            });
            try
            {
                filepaths = getFilepaths((string[])(e.Data.GetData(DataFormats.FileDrop)));
            }
            catch (Exception) {}
            int filesCrypted = 0;
            this.Invoke((MethodInvoker)delegate
            {
                this.encryptionProgress.Maximum = filepaths.Count;
                this.encryptionProgress.Value = filesCrypted;
                this.encryptionProgress.Visible = true;
            });
            foreach (string fileLoc in filepaths)
            {
                if (isClosing)
                    break;
                this.Invoke((MethodInvoker)delegate
                {
                    this.encryptionProgress.Value = filesCrypted;
                    this.fileProgressBar.Visible = true;
                    this.currentFileLabel.Text = "Decrypting: " + fileLoc;
                });
                if (File.Exists(fileLoc))
                {
                    if (cryptor.DecryptFile(fileLoc, fileLoc + ".unlocking", p))
                    {
                        try
                        {
                            File.Delete(fileLoc);
                            File.Move(fileLoc + ".unlocking", fileLoc);
                        }
                        catch { }
                    }
                    else
                    {
                        try
                        {
                            File.Delete(fileLoc + ".unlocking");
                            break;
                        }
                        catch { }
                    }

                }
                filesCrypted++;
            }
            this.Invoke((MethodInvoker)delegate
            {
                this.encryptionProgress.Value = filesCrypted;
                this.encryptionProgress.Visible = false;
                this.currentFileLabel.Visible = false;
                this.fileProgressBar.Visible = false;
                this.Height = 254;
                if (isClosing)
                {
                    isClosing = false;
                    this.Text = "LiteLock v2.0 - Created by DarkTussin";
                    //this.Close();
                }
                isWorking = false;
            });
        }

//continued in reply

/r/funny Thread Parent Link - i.imgur.com