Hi;I added Norton 360 and has only 512 memory in total. Try to add 512 X2 did not accept.  It takes a while (15-20minutes), can not open Firefox it says script could not recognized or takes another 15 minutes to load it. Google chrome is little faster but in the middle of writing it unresponsive pages kill or await. Can not work in two windows, it gets unresponsive,   I am sick and tired of it, can not afford to buy new, does not accept 512 mb ram. Even while typing it gets slow, can not reformat it again, I will loose Norton 360. Any suggestion??????????