How Would I Clear My Bios Password On My Dell Laptop Latitude D505?

A. By Using the Motherboard Jumper:
 
In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
 
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
 
When you find the jumper, look carefully.  There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. E.g. If the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
 
Make sure to turn the PC off before opening the cabinet and resetting the jumper.
 
 
 
B. By Using Software:
 
 
I have found that BIOS/CMOS Password Recovery Tool is the most effective.:
BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS password. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds
 
BIOS/CMOS Password Recovery Tool  Service:  www.biospasswordrecovery.com

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Taking the cmos battery out for 5 minutes and then replacing it or try half hour if that doesn't work there are some programmes out there that can do this so all is not lost other than that if you google this problem there are some standard passwords that are factory preset into the machines that might work other than this there is the option of sending it back to manufacturer for a bios reset or there might be some jumper switches that are located on the mother board that can be activated to reset the bios labelled something like RESET or BIOS or similar, these though are only reachable through your keyboard so are fiddly to reach.