i have a tascam us-100 i want Windows 7 generic driver
the program that ships with the unit is a free software here the link to the updated software.http://audacity.sourceforge.net/download/
here how to set windows sound per the user guild.http://tascam.com/content/downloads/products/203/E_US-100_OM_RevA_web.pdf
if your mb is missing usb drivers if it has intel chipset go to intel chipset driver download web page.
amd has chipsets drivers for there mb and nvidia and via for theres. using a program like cpu-z will read your mb info.