It's probably the on-board LAN device.......are you set up for DSL/CABLE/SATELLITE modem service or do you have two computers networked together? We have to first find out how you are using the LAN/Ethernet connection and if you aren't using it, it can be disabled in the bios so you don't get that error anymore.
My Dell laptop Inspiron 8100 only occasionally starts up and then works competely normally. But 49 out of 50 times I try to start up I get this error message: "PXE-05 the LAN adapter's configuration is corrupted or has not been initialized. The Boot agent cannot continue."
I think it cannot find the C-disk? The F2 on start up doesn't work either although I do get the blue Dell-screen just before that message appears. Is this a loose contact somewhere? I changed the C-disk for the floppy-drive which was no success either.Any ideas?