This link will give you all the advice you need
This is a link to a Free Nero Wwav editor..
Personally I use Nero 7, for my recording needs, however there are plenty of freebies out there.
All you need to do is plug one end of your cable (3.5mm jack (?) in the output of the recorder and the other end into the MIC of your computer,start the tape then goto your audio control, and play with the settings until you get a good quality sound.