sorry but i thought i'd throw in my opinon - just for the fun of it, right i think ninja fetus ment you already have 128Mb RAM built into the laptop, the reason you only have 1 dimm slot: this is for upgrades, since you already have 128Mb in that slot, i think your only option is to buy some new RAM (e.g. 512Mb) and remove the 128Mb dimm and replace with the one you bought, obviously remembering ninja fetus said you can have a maximum of 1Gb RAM