Hello. I have a laptop ACER ASPIRE 5733 bought in 2012 (v1.07 motherboard version), under Windows 10 64 bits. Original there is a memory of 4 GB DDR3 " ELPIDA 4GB 2Rx8 PC3-10600S-9-10-F2." I wanted to boost memory, after checking that the motherboard is supposed to support 8 GB. I ordered from a site a new ram SODIMM 4 GB brand G.SKILL ref DDR3-1333 PC3-10600 / 10666 Once the two bars installed in the two slots of the PC, in the initial Setup, I see well indicated 8 GB of memory. But Windows can not start: I enter a loop "Preparation of automatic repair" and reboot, with occasional messages such as: IRQL Not less Gold Equal Page Fault in Nonpaged Area Kernel Security Check Failure PFN List Corrupt If I remove the original ELPIDA bar leaving only the G. Skill bar, the setup indicates 4 GB of memory, but Windows 10 always crashes at startup. I thought I had everything checked to have the necessary compatibility. Where did I plant? Do I have a solution other than sending the card back ? Do I have to give up my memory expansion to 8 GB? Thank you in advance for your help. In another forum I saw a member having a similar problem.