- Download the latest Vista drivers from http://www.tascam.com/products/us-122;9,15,68,19.html;
- Extract the .exe file from the package;
- Right click on the extracted exe file, select properties;
- Go to the compatibility tab, select "Run this program in compatibility mode for:" and in the dropdown box underneath select "Windows Vista (Service Pack 2)" (any Vista selection will probably work but this is the one that did it for me);
- Choose OK to save the settings
- Run the installer by double clicking on it and install as normal
