ok ditch the linux problem, hopefully someone can help me with this one though. i've been putting a computer together for my friend the past couple of weeks but have experienced many problems installing windows, i think i may have narrowed the problem down to memory but i am not sure, so here it goes, i can get windows 98 to install but when i attempted to in stall direct X so i could install video drivers, the system crashed, so i went on to the next step, i tried to install windows 2000 while in win 98, files would copy, the system would restart in DOS mode, i would get through telling it where to install and to leave the current file system intact, it would act as if it would begin to copy more installation files, but right before it could, it would go to a blue screen error, "PAGE FAULT IN NON PAGED AREA", i assumed this was a memory issue, so i tried a different stick of ram same thing happend, it is possible both were bad tho, although one was newer, one was ECC registerd one was not, so i began to try to install windows XP, the install process would get to the point were it needed to copy files from the cd, every file it tried to copy it would give me errors saying it could not be copyied, so i put hte hard drive in my other computer to finish the install process, it worked, but now when i put the hard drive ( with a full working windows XP installation back inthe previous computer, windows will begin to load, and get to the login screen and it just be a blank blue screen, like its in windows but it has encountered and error somewhere. This computer has baffled me for the past several months, i cannot get anything to work, i swear its curesed, everything i brand new, i've tried several new CD rom drives, just in case, several different sticks of memory, i have flashed the bios ( even after this the computer just restarts every time it gets into windows, this is the point i am at now), nothing works!@!@ , i am putting this out there, becuase i am in dire need of help, if anyone thinks they know the cuase of this problem, please any advice would be greatly appreciated...here is the setup for the computer i am working on

AMD athlon 1800
MSI kt333 mobo
1 stick crucial 256mb DDR ECC registerd RAM
GeForce 4 MX 440 64 MB DDR vid card
20 gig westerd digital 7200 rpm ata 100 Hard drive
36x philips cd rom drive unit
D-link 10/100 ethernet adapter
400watt Power supply
HELP!!