config.sys eh? Didn't know XP had one of those as it's used for DOS which XP does not run on like the previous Windows. I've been messing with PCs for 10 years and currently do phone support for Polaroid digital and can tell you that the major players (Gateway, Dell, HP, etc) have cut back on the tech support's salaries and are hiring less than qualified people to work for them (typical for the current market). Everything is based on call volume and let's just say they will say anything just to get you off the phone and rack up a higher total as this will keep their job. ANYWAY, a quick search on Google brought up this:

http://www.experts-exchange.com/Oper..._20275502.html

Check it out. You say you have WinXP? From what I read it's definately Dell related but with older versions of Windows. Honestly, next time you or anyone has any PC questions just type the error into Google and you will usually find your answer.