Every Time a Download Finishes my comp freezes for a little
 

I have a relatively new computer with a good processor n graphics card n a gig of RAM and a cable connection but after every song finishes downloading the program freezes for about 30 seconds and lags my omp to where i can do nothing really It is after EVERY song and it's getting annoying. How do i fix this?

Try deleting the preferences folder (when LW is closed). After doing this, you'll have to reset your options. If there are settings you're not sure of, make a note of them first.
Fixes for LimeWire

I tried deleting the limewire folder in the applicationData section and one of them was deleted but there were two of them in that section. The second folder I can't delete because it is unable to read file from source or disk.

the freezing happens more often if: the file is large, if you gave an antivirus program it automaticaly scans it...