Hi! I just bought two Kingston 4gb DDR3 RAM modules to install on my old Acer Aspire 5741 to give it new life. However... Windows did not boot after installing them, so I switched to the old 2gb RAMs I had. I've been researching (always after the fact, of course) and saw that the laptop service manual (http://tim.id.au/laptops/acer/aspire 5741 5741g.pdf) says that the slots are for 800/1066 MHz, and the KVR16s11s8/4 manual (https://www.kingston.com/dataSheets/KVR16S11S8_4.pdf) says 800MHz fCK for 1600Mb/sec/pin. Am I out of hope? Can I make them work in my slots? Would these actually work?