I have an acer ast180 the mobo is EM61SM/EM61PM and the OS is 32bit vista, i have 4 matching 1gb strips of 4200 ddr2 533mhz ram. Whenever i put more then 2 strips in my machine windows will not start. All info i find says i can have up to 4gb on my comp, and i know 32bit vista may not recognize it all, but why can i not install more then 2gb and windows will not start. All the ram works and and all the ram slots work, i even tried installing 2X1gb and 2X512mb and that did not work either. I have been trying to resolve this for 2 weeks now and acer support is not usefull please someone make my new year and help me figure this out.