Greetings, First the specs: Toshiba Satellite L25 - S1192 1 stick of 256 MB 2 sticks of 1 GB to upgrade Celeron Processor Windows XP Home My friend has the laptop described above with just 512 MB of ram. Wanting to speed it up a bit, he bought a 1 GB stick and tried to simply swap them (I'm not sure if he knew that this model has two slots or not). After swapping them the computer no longer booted at all. So he decided to swap them back, thus putting in the original 512 MB. Well, alas...the computer still wouldn't boot at all. Enter me. Now I've tried to use both of these different sticks in various combinations of the two slots and no matter which way I do it I get the same behavior: I turn the computer on...it goes through a brief Toshiba startup screen. It then comes to the WIndows startup page saying that windows shut down incorrectly last time, etc...please choose Normal Configuration, Safe Mode, etc. If I choose any configuration other than Safe Mode, it immediately freezes and that's it. If I choose Safe Mode, it loads the drivers and then freezes and that's it. One other thing to note...going into the BIOS reveals this for the amount of System Memory: 640 KB Now I'm thinking maybe that for some reason the laptop just stopped recognizing RAM completely? Could that be it, and if so what should I do? Thanks so much for your time!