Hi, Im new here. Been trying to solve my problem on some other forums but to no avail so my friend recommend me this forum. Im really at my ends on how finding out the problem now. 2 types of bsod i have been getting. it occurs then for 2-3 days its fine and it comes back again. now i've been getting it 2 days in a row. 1. Bad Pool Caller 2. PFN List Corrupt updated all my drivers. tested my rams with memtest. tested my harddrive with seagate tools. all turn out fine. one of the dump even mentioned some file that has to do with zonealarm and i was told to update zonealarm. updated it. still problem occurs. I've search around and realise that some people with bad pool caller can't even boot up to windows but my is fine. it just occurs for a few days and its okay. I've attached the dumps for you gurus to analyze. My Specs incase you guys need it. Intel Core2 Quad Core Q6600 Asus P5K-E Wifi-Ap Edition Leadtek 8600GTS 256MB Corsair PC6400/800Mhz Twin[Dual Channel]1GB x2 Seagate Barracuda 7200.10 320GB 16MB Samsung 20x DVDRW [Sata] Benq 16x DVDRW [IDE] Cooler Master Extreme Power 550w the last 2 was the PFN List Corrupt but i got another bad pool caller again.