Dell latitude d800 laptop i have forgetton the

Remove the BIOS battery and the main battery for 20 mins. then replace the batteries and boot up the laptop. If you still cannot get into the BIOS without a password then -
REMOVE BIOS PASSWORD with these programs

PC BIOS toolkit is a password removal/decrypt and BIOS settings modification/backup/restore.
http://www.syschat.com/download120.html&act=down
CMOSPwd - CMOS password recovery tools
http://majorgeeks.com/CmosPwd_d239.html
Using a computer with Internet access, download the files from these WEB sites and create a bootable CD disc to run them.

Download, burn to disc and boot to the Hiren Boot CD then follow video

you can break the BIOS password by refixing the BIOS battery.

replace either your cold cathode screen lamp or, your inverter board in your display

Select your model on website below to download drivers:


Dell Drivers and Downloads

Remove BIOS battery. Short BIOS jumper or leave the battery out for a long time(Over night,maybe) This should default the BIOS to having no pass word present.  If that doesn't work then evidently Dell has one within the BIOS . Just ask them.

is it asking for bios password? if so get in touch with DELL if youre a second user of unit it will be harder for dell to supply you with pass unless you have details of original owner e.t.c there is a third party solution BUT I dont know if I can say here..put it this way ..where theres $$$ theres a way :)

This may be SpeedStep slowing the processor to save battery life. It speeds up when it is needed.

Try re-installing windows.