thank for your help, it's very nice to discovert "bios world"! What do you mean (I'm beginner)? Is it a stuff about OEM product key (en.wikipedia.org/wiki/BIOS#SLIC)? Indeed, I tried this: CBROM215.EXE E6400A32.exe /D and it did work very well: CBROM V2.15 (C)Award Software 2001 All Rights Reserved. ******** E6400A32.exe BIOS component ******** No. Item-Name Original-Size Compressed-Size Original-File-Name ================================================================================ 0. System BIOS 645986Eh(102758.11K)2921B5B4h(673901.44K)cCƒ▒c◄%↨uò↕ò¼¾|┌ æsÚÚ>°▼ôô5Ñ♣àY]×‼~î:ð¬ð<¶◄Û¾t<╠£®¬╩¬¿Âu£Úç02jız♦² 1. Other(BFCF:08A3) A9400F8Ah(-1421308.12K)D896155Eh(-645818.69K)Ó╬ßz└C↓►▓Z║‗ ┘ ╠=B9 Ü═¾²♦1ÛyÞ&╬YçÝ☻ÍYbu§ÉÈÓxníW4OɬÿdâÆ~yw5╩b┌¯◄ûþuó§Må¥öÛðk´ß;aÕõöwc®¼ÿÅ┐ÞI*¸[»[i┤¸ l█┬)¾ <↨.eD↓pƒ'Û↓1┤ÅHTz♫ª♀gúd4◄(ÖÇü²à♂ C└■³┴←&Hè▀~ƒà»░↕3ñ7\½d☼l▒~5┐ Total compress code space = FFD5FC37h(-2688.95K) Total compressed code size = 1B6CB12h(28082.77K) Remain compress code space = FE1F3125h(-30771.71K) ** Micro Code Information ** Update ID CPUID | Update ID CPUID | Update ID CPUID | Update ID CPUID ------------------+--------------------+--------------------+-------------------