Start, Run, "devmgmt.msc", OK. The non-functioning device should be readily apparent. -----Original Message----- From: PCBUILD - Personal Computer Hardware discussion List [mailto:[log in to unmask]] On Behalf Of joseph marty Sent: Monday, August 16, 2004 11:37 PM To: [log in to unmask] Subject: [PCBUILD] XP PRO SP1 error 31 message I cannot install SP2 because I get an error 31 a device attached to the system is not functioning. This same error shows up with Spysweeper. I thought it was a bad Power Supply, but I just installed an Entec truepower 550 Watt, and it still gives the error. I have Avant browser which can't save the non default settings I give it. I did a google search but can't find anything close to what I'm getting. Where do you start looking for this device that isn't functioning? Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com