I am the person that will be helping you today.
You can use the Hamrick software in order to use this scanner. The software is found at the following page: http://www.hamrick.com/vuescan/microtek_scanmaker_s400.html
If you wish, I can remote into your system and fix this for you.
I look forward to hearing your feedback concerning whether or not your problem is fixed.
I hope to hear back that all is working. If this is so, please do not forget to rate my help on the top of this page (choose the number of stars and click the Submit button). If it is not, please respond below.
I will be standing by,Jason