Gathering Additional Evidence Single-Tier Product Codes Use the following instructions to obtain your Single-Tier driver product code:a) Open your Windows Explorer.b) Locate your Lite32 directory.c) Look for your driver .dll, e.g. ntl4c2zz.dll.d) Right click on the .dll.e) Select the Properties menu item.f) Click on the Version tab.g) Highlight the Product Code entry in the Item Name: list box.h) Post the Product Code value(s) that appear(s) in the Value: list box.For example:NTL4C2XX