By Default, Windows Explorer will open My Computer or your home hard drive (usually on drive C:) every time your open it. Whereas, I need to open hard drive D: not drive C:
After, I looked on magazines, I found the way. And it’s just a simple, just add its parameters.

And here are the parameters:
1. Open Start -> All Programs -> Accessories menu, right click Windows Explorer shortcut and then click Properties.

2. Click Shortcut tab, in target box, you’ll find that it fills with %SystemRoot%\explorer.exe. Just add parameter /n,/e,d: so your target be %SystemRoot%\explorer.exe /n,/e,d: and then click OK button.

3. Try to open Windows Explorer and your hard drive D: will open first.

You can change the letter drive with your own favorite drive. Just replace the last parameter with your drive letter. For example, you want open drive F: first, just write %SystemRoot%\explorer.exe /n,/e,f: on target box.