When I turned off my dell inspiron b130 it was fine when I turned back on it states bad checksum. I can not access start up but I have tried to reboot and all other possibilities without any success . Do you have any suggestions this is a new laptop only about 8 months old I have had a compaq for 4 years I guess I should stayed with a relaible brand . Thanks

Well... you could try the old turn it on and off again but I'm sure you've tried that...
Not being a techy, id say format it, or take it to the shop.. because if you don't know what's going on its probably best to leave it to someone who does, do you have a mate into computers?