im not familiar with LAN game and other game etc. but based imo question why mo lag ang pc1 if mo access c pc2,
maybe beca
pc1 is busy downloading, so ga neh sa imong network device, ethernet card and high activity sa imong router, so if mo request c pc2 to join the game hosted by pc1 which is ang process is mo agi sya sa imong router which is high activity or high traffic kay ga download c pc1, so lets say nga wala problema sa router so ang request asa man sunod adto sa imong network device di bah? so busy gihapon kay ga download man ka at full speed. so na-ay tendency nga dugay maka sulod imong request.. or maybe pod wala pa ma fully download ang games nga iya gi create..

di ka ayo ko suhito aning LAN games... pa humana lang sa kono og download c pc1 then diha pa access if ok na c pc1