The BIOS Mods and Hardware sections of MDL is already cluttered with increasing number of threads requesting (forgotten) Dell BIOS password. As its a forum, everyone has the right to open a new thread but this trend leads to a forum full of junk!! So I have created this FAQ. A. If the last 4 letters of the Service Tag of your Dell laptop is 595B/D35B/2A7B/A95B 1. Visit Dogbert's blog and follow the instructions. 2. You can also use this web service (based on Dogbert's findings) by Вячеслав Бачериков. 3. After entering the password, you might need to press CTRL+ENTER. 4. If the above doesn't work, then you should follow Section C. B. If the last 4 letters of the Service Tag of your Dell laptop isn't 595B/D35B/2A7B/A95B (like 1F5A/3A7B/3A5B/1D3B etc.) 1. You may try to do a forceful BIOS recovery. Read and search the forums for instructions. Some useful links are below. 2. You may downgrade to a previous edition of the BIOS whose last 4 letters of the Service Tag is 595B/D35B/2A7B/A95B. Then follow Section A. C. Regardless of the last 4 letters of the Service Tag 1. Chat with Dell Technical Support. 2. Transfer the laptop ownership/warranty. This is also useful. You may get your (forgotten) HDD password as well by the above procedures. If you want to erase the HDD without knowing the actual password, you may try MHDD. ** Some important notes by LatinMcG. For decompressing newer Dell UEFIs, see here. For Dell AMI Aptio recovery, see here. For Dell HDR method recovery, see here. Credits MDL Forum, specially LatinMcG & tqhoang.