If you're interested in only ADB, download these files and extract them somewhere in a folder on your computer:

http://www.mediafire.com/?0cli8l5qtuqi074

Then create a file: adb_usb.ini in the following directory:

Windows 7: C:Users<user>.android

Windows XP: c:Documents and Settings<user>.android

Enter following code in the ini file:

0x0e79

You should be able now to execute:

adb start-server

Hi

Are the google drivers correctly installed (not required for Linux)? (check Device Manager)

If not, remove the current Google Driver from the device manager and install PDAnet (http://junefabrics.com/android/download.php)

Have you restarted adb, after creating the file?

adb kill-server

adb devices