I have a dimension 2400 with XP home edition.  A couple of days ago I lost my internet access..  My other computer is connected  via dsl and a wireless router.  After talking to the dsl and microsoft tech support, I tried pinging some web sites with no success.  I did the start>run>cmd>ipconfig and got back 0.0.0.0 for an IP address. Next I tried all of the Dell F12 tests and no errors were reported.  I did start>control panel>system>hardware>device manager and got a blank white screen with no devices.  The bottom tool bar is white instead of blue.  I need your help as I don't know what to do next.  I also switched out the ethernet cables.