Computer does not recognise scanner

ok...one more time...do a force install this way:
Look on your NIKON cd (or do a windows search function) for files named "...something.MSI". Do you know what I mean by that last sentence? Right click on this file and select either the "INSTALL" or the "RUN" utility from the drop-down list. How was any of this rated as NOT HELPFUL? Tell me where you get stuck, don't just stop and rate me badly!