A few years ago, I wrote an article explaining how to change the volume serial number.
This program does not work properly now under Windows Vista or Windows 7 unless executed as administrator. Following many suggestions, I updated the tool to support the latest Windows version.
Please note that after you change the serial number you may need to reboot the PC for the settings to take effect.
Note: You may need to download and install the Microsoft Visual C++ 2010 Redistributable Package (x86).