Ok, I've searched the forums and can't find a specific answer to this. I upgraded my memory with (4) 1GB DIMM's on Win XP Pro 32-bit. I booted up and checked the properties of "My Computer" and it said 4 GB RAM. Now all of a sudden a couple days later it says "2 GB RAM". Not sure what is going on here. Could I have done something? Any thoughts are appreciated.