I have a dell latitude d620 it says I have invalid configuration please run setup how do I go about that if I weight a while it goes type in the systems password or administration password I lose them when the kids where on how can I fix it
As @Hang said, most probably your CMOS battery has died (your laptop is of early 2007 vintage). As for lost passwords - contact Dell Support for help, here you won't get any help about that.