First time post, new member. Thanks in advance for any assistance. 2 year old Windows 7 Home premium, 64bit. Sony VAIO, VPCEH12FX. Never had any issues with this computer and out of the blue it began BSODs and freezes. When left to Idle experiences random BAD_HEADER_POOL BSODs and screen freezes. 5 over the past 24 hours. Does not happen if I shut down laptop between uses and never happens while I am using the computer. Performed clean install; replaced ram with NEW 8GB stick. Out of options. DMP files and other diag files requested in forum how to are attached in zip folder. Thanks!