System specs: P4 1.7 ghz Intel Proc 256 pc-133 SDRAM 168 pin 256 9600 XT Radeon SONY Vaio PCV-RX560 Basically i had bought another stick of 256 mb off of newegg, but i had bought a high density chip, not a low one. Anyways, i decided to reformat slightly after i installed it beacuse i hadnt for a while andd the comp was getting real slow. Now whenever i boot up windows up to the desktop while loading the icons I get a BSOD (something about making sure your hardware/driveers are working or somehting) and i have to shut down. I reformatted again, and it booted up fine the 1st couple of times after i had installed some drivers, but then it happened again. I went back in safemode and uninstalled the drivers and it booted up again ok, but when i downloaded windows updates and installed them and re booted the same error came up! Any help would be appreciated, and thanks. (BTW if anyone can help me find a 256mb pc-133 168pin low density RAM uner $40 you would rule!) Thanks !!