Maplestory Lag Issue

This also happens with me, i lag in all my mules that go in event hall, so it's my pc, not the character, ursus lag a TON, it's almost impossible to attack, until most people are dead and stopped attacking.
My old pc could do all that very good, it was a old PC, win7 home, with only 2g of ram and 1g of memory card, so maybe old pcs with less cores processors, the old one had 1 if i remember, and my actual one 4.

I did a temp fix to event hall. I opened up task manager, went to details, right clicked maplestory and hit set affinity and only had 1 cpu core clicked and after 30 seconds I can freely walk through event hall. Having more than one core clicked brings the event hall lag back. I then changed my battery settings to maximum performance and reinstalled maplestory and I was now able to Ursus (and I don't have to due the task manager affinity change anymore), but after an hour I tend to lag a lot and I have to close maple and restart it. My laptop is now definitely louder due to the battery settings. I think Maple starts lagging due to overheating issue possibly so I ordered a laptop cooling pad.