Hi, This is my first post here. I work at a Chemichal geological lab here, running an Atomic Absorption Spectrometer on an older HP desktop. It's an HP Compaq dx2300 Microtower Intel Pentium Dual CPU 1.8Ghz with 1 gig of ram. I'm not sure of the spacifics without racking open the case, which i need to get alot of OK's to do. Anyway, I am running a program called Spectraa to collect data from the Spectrometer, and every now again if the tower gets even slightly bumped everything will lock up, having to force a restart and loseing all the data collected. Its been working great for the last year and a half and over the past month this issue has come up. The tower is palced on the floor since the tables have no room for it, and unfortunaly every now and again someone will walk by, or push a kart by or something, which will hit the table, bumping into the tower and causeing the issue. There is no chance of getting a new one, or most likely even any replacement parts unless its compleatly doa. If anyone could give me any advice as to what to look into when i'm able to get inside the tower that would be great. Thanks in advance.