Need help My program takes 30% of my i7 2600k processor

i wonder why my processor takes 30% of my processor
i even use i7 2600k

when i tried at my pc at work it takes almost 100%
but the pc didnt lag at all..

i use a timer - inverval 100
and use 1 background woker

any idea??

A bit of your code would be appreciated as we can't figure what it's doing

i can't really give the full code because its like 1500++ line.
so i dont even think it will help..

so i figure and take what they do.
some of them still a function.. so

ill explain a little bit

add(parameter) = add to list
getFiles(parameter) = recursive for taking folder directory based on what user drag and drop

so basicly this timer doing anything else. but it never take like this..

after i implement the background worker here the problem comes..
i just wonder do they really gone if i dispose it?
after all i went to give List to a Background worker so every files added to my list .
will be added and not wait for all files be read.

why i use multiple background worker is simple as like this
after i add. i wanted my files to be added to the datagridview.
so i create a background worker named thread..
he is the one and only one background worker still running even the data already added all.

for the background worker is like this

Code:

---

private void bg_RunWorkerCompleted(object sender,RunWorkerCompletedEventArgs e)
        {
            BackgroundWorker temp = sender as BackgroundWorker;
            temp.Dispose();
            bg.Remove(temp);
        }
        private void bg_DoWork(object sender,DoWorkEventArgs e)
        {
            Add_list al = (Add_list)e.Argument;
            String[] directoryName = al.data;

            foreach (string data in directoryName)
            {
                if (data.LastIndexOf(".") >= 0
                    && (data.Substring(data.LastIndexOf(".")).ToLower().Equals(".mp3")
                        || data.Substring(data.LastIndexOf(".")).ToLower().Equals(".flac"))
                    )
                {
                    add(data, al.header);
                }
                else
                {
                    getFiles(data, al.header);
                }
            }
        }
        private void thread_DoWork(object sender,DoWorkEventArgs e)
        {

        }
        private void thread_RunWorkerCompleted(object sender ,RunWorkerCompletedEventArgs e)
        {
            if (add_lastIndex < x.Count)
            {
                addToListBasedOnHeader(x[add_lastIndex]);
                add_lastIndex++;
            }
            thread.RunWorkerAsync();
        }
        private void read_bg_DoWork(object sender, DoWorkEventArgs e)
        {
            String[] ListName = (String[])e.Argument;
            try
            {
                for (int i = 0; i < ListName.Length; i++)
                {
                    StreamReader sr = new StreamReader(Application.StartupPath + "/playlist/" + ListName[i] + ".dmpp");
                    String list_Error = "";
                    List<String> temp = new List<string>();
                    while (!sr.EndOfStream)
                    {

                        String path = sr.ReadLine();
                        if (!path.Equals(""))
                        {

                            //This Slower Because CHECKING ALL DATA WHEN READ
                            String File = path;
                            if (System.IO.File.Exists(File))
                            {
                                //add(File,ListName.Items[i].ToString());
                                temp.Add(File);
                            }
                            else list_Error += File + Environment.NewLine;

                            // this not check before adding
                            //add(path, ListName.Items[i].ToString());

                        }
                    }
                    if (!list_Error.Equals("")) MessageBox.Show(list_Error + "All List Above Was Not Found..");
                    sr.Close();
                    Add_list al = new Add_list();
                    al.data = temp.ToArray();
                    al.header = ListName[i];
                    addBG();
                    bg[bg.Count - 1].RunWorkerAsync(al);
                }

            }
            catch (Exception ex) { MessageBox.Show(ex.Message); }
        }
        private void read_bg_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            BackgroundWorker temp = sender as BackgroundWorker;
            temp.Dispose();
            bg.Remove(temp);
        }

---

and for the timer

Code:

---

private void value_Tick(object sender, EventArgs e)
        {
            autosetcolor();
            //label3.Text = "" + bg.Count;
            //label3.Text = x.Count + "-" + list[ListName.SelectedIndex].Rows.Count;
            if (WindowState == FormWindowState.Minimized && minimized == 0)
            {
                if (option.mtst.Checked == true)
                {
                    GoToTray();
                }
            }

            if (status_play == 1 )
            {
                //seek_bar.Maximum = (int)wmp.controls.currentItem.duration;
                try
                {
                    if (status_down == 0) seek_bar.Value = (int)wmp.controls.currentPosition;
                    DurationText.Text = "";
                    if ((int)wmp.controls.currentPosition / 60 < 10) DurationText.Text += "0";
                    DurationText.Text += (int)wmp.controls.currentPosition / 60;
                    DurationText.Text += ":";
                    if ((int)wmp.controls.currentPosition &#37; 60 < 10) DurationText.Text += "0";
                    DurationText.Text += (int)wmp.controls.currentPosition % 60;
                    DurationText.Text += "/";
                    if ((int)wmp.controls.currentItem.duration / 60 < 10) DurationText.Text += "0";
                    DurationText.Text += (int)wmp.controls.currentItem.duration / 60;
                    DurationText.Text += ":";
                    if ((int)wmp.controls.currentItem.duration % 60 < 10) DurationText.Text += "0";
                    DurationText.Text += (int)wmp.controls.currentItem.duration % 60;
                }
                catch (Exception ex) { MessageBox.Show(ex.Message); }
            }
        }

---

If your system is reporting 25% processor utilitzation on a quad-core system (for example, an i7) then it (likely) means some process is fully utilizing one (of four) cores. This probably occurs because you're calling a subroutine very 100 ms that takes longer than 100 ms to complete (thus, constant utilization).