My y450 is slightly different from yours. Mine is with GT 130m graphic card, and i've been trying to solve my "error 12" in device manager without any progression. I understand most of your steps except the follow line. Could you please tell me how to "got 256MB free"? I dont know if my problem is related to 4G memory limit since i only left 1 GB memory on motherboard. I've already tried 36bit(56.25G) item in SETUP 1.10b5 version, resulting in black screen after windows 7 four-color booting peroid. Also i tried some other DTST method. Thank you very much. btw inyallan, could you tell me your BIOS firmware version? I tried 17CN28WW and 17CN38WW. Thanks.
