Sorry,P2P means peer to peer which is what limewire,frostwire etc. are,they are peer to peer clients that you use to download files from the gnutella network.
My best advice to you is turn on the junk rating and bitrate headers and never download anything that has a high junk rating and no song file under 192 bit rate.
And remember,if one file doesn't work there are thousands more where it came from,just delete it and find another one.