Ok, I think I know what you did now. I'm gonna try to walk through this.
First off, you should have downloaded the file LWdrivers.zip from the SCT site.
You need to unzip this file to somewhere that you can locate later on.
Next, since you already plugged in you SCT to the computer, you will need to manually install the driver using the device manager in windows. If you don't know how to open the device manager here are the directions: Right-click on the My Computer icon on your desktop and click on properties. Next you will click on the hardware tab on the window that just opened. Next click on the Device Manager button. Scroll all the way to the bottom of the list that comes up. Click on the plus next to Universal Serial Bus Controllers. This is where the driver utility for the SCT will show up.
Now go ahead and plug your SCT into the computer. A line for SCT USB Driver(SEE A) should show up in the device manager. Double click on it. This will take you to the properties page. Now click on the Drivers tab(SEE B) and then the Update Driver button(SEE C). The Update Harware Wizard should come up. Click on "No, not this time"(SEE D) and then click next.
On the next screen click on "Install from a list or specific location(Advanced)"(SEE E) then click next.
On the next screen uncheck "Search removable media"(SEE F) and check the "Include this location in the search" box(SEE G). Next click the browse button and locate the folder that you unzipped the LWDriver files to earlier. Click OK then Click Next. The program should locate the file and install it from there.
I don't know if my edits are gonna show up in the pics but everything is in the pics how it should be. If there is anything else you need let me know.