SLP3.0: The bios contains a SLIC like SLP2.0. Additional to its public key and marker it consists of a signature field. Signature field: 9Ch bytes, read from different places at the EEPROM area, where the bios is stored (FFFFFFFF-biossize), encrypted and stored as signature field at bios. The signature field has to be at a defined place, since it cannot be a part of the area to read those bytes. The bios maps the signature field to the SLIC at Acpi namespace. Each OEM knows about the algorithm. So after a new bios is programmed, every OEM has to create a bios specific signature table and to add it to the bios to the defined place. Since every bios is different, every signature table will be different. Windows7 has implemented this algorithm, reads those 9Ch bytes from the EEPROM (bios) at the same addresses, encrypts them (builds the signature) and looks if they match to the signature field of SLIC. If not windows7 won’t activate. Result: Since you don’t know how to create a valid signature (algorithm unknown), you cannot make a valid signature filed for your bios (mod.) You have to get the tool, the algorithm…………. Don’t be shocked!!! Fortunately this is just my idea, my invention how I would do it……..I don’t know what’s about M$. Feel free to write your comments……..