First of al, hello to everyone!! I jut finished building a custom pc and am having BSOD's happening. The main one I'm getting is the PFN_LIST_CORRUPT and the other is MEMORY_MANAGMENT. The PFN occurs more frequently then the other one does though. There's no one or two things that I'm doing at the time they happen, in fact, they happen while my PC is sitting at idle. Along with these BS's, I also have applications crashing randomly. This mainly tends to be the 2 online games I play, Lord of the Rings Online and Tera Online. No other applications seem to crash. At first I was thinking that something with the SSD I use for the OS was causing the problem, but after doing some research it seems like it may be a memory problem?? I performed all the steps in the "How to ask for help" thread and attached the folder to this post. View attachment W7F_13-02-2013.rar A bit about my system.... Mobo - ASUS M5A99X EVO R2.0 AM3+ AMD 990X SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS Processor - AMD FX-4170 Zambezi 4.2GHz (4.3GHz Turbo) Socket AM3+ 125W Quad-Core Desktop Processor FD4170FRGUBOX Memory - G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL9D-8GBXL SSD - G.SKILL Phoenix III FM-25S3-120GBP3 2.5" 120GB SATA III Internal 7mm Solid State Drive HDD - Seagate Barracuda ST1000DM003 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Graphics card - NVIDIA GeForce GTX 550 Ti from EVGA with 1023MB Memory Any help is appreciated and thanks in advance!!!