IF your soundcard has line in(maybe a blue jack, NOT red or pink which is mic) you can buy an adapter cable,
mini stereo to 1/4" standard guitar type. At this level of quality you'll then have to deal with the windows mixer
to select the line level input to the computer. Try right clicking on the speaker icon, click OPEN VOLUME CONTROLS
then look for and click OPTIONS, then PROPERTIES, then select RECORDING and select LINE.
If you've only a mic input, you'll need a dfferent approach.
Go Firewire, it's worth the $$$ and more transferable.