diff --git a/thinkpad_unlock_bios.c b/thinkpad_unlock_bios.c
index f16b120..6431c61 100644
--- a/thinkpad_unlock_bios.c
+++ b/thinkpad_unlock_bios.c
@@ -140,24 +140,46 @@ char tryunlock(char *dir)
 				{
 					buff[0xf00+a]=id[a];
 				}
-				for(a=0;a<256;a++)
+				
+				//change MAC ADD
+				if(fseek(bios,0x1000,SEEK_SET))
 				{
-					outputdir[a]=0;
-				}
-				printf("id: %s \n",id);
-				sprintf(outputdir,"%s%s",inputdir,"_unlock.bin");
-				printf("Output flie %s",outputdir);
-				output_bios=fopen(outputdir,"wb");
-				if(output_bios==NULL)
-				{
-					printf("ERROR. can't Output file ..\n");
+					printf("ERROR. -0\n");
 				}else
 				{
-					fwrite(buff,0xffffff,1,output_bios);
-					fclose(output_bios);
+					for(a=0;a<32;a++)
+					{
+						id[a]=0;
+					}
+					fread(id,6,1,bios);
+					for(a=0;a<6;a++)
+					{
+						buff[0x1000+a]=id[a];
+					}
+					
+					for(a=0;a<256;a++)
+					{
+						outputdir[a]=0;
+					}
+					printf("MAC: %02X%02X%02X%02X%02X%02X \n",id[0],id[1],id[2],id[3],id[4],id[5]);
+					sprintf(outputdir,"%s%s",inputdir,"_unlock.bin");
+					printf("Output flie %s",outputdir);
+					output_bios=fopen(outputdir,"wb");
+					if(output_bios==NULL)
+					{
+						printf("ERROR. can't Output file ..\n");
+					}else
+					{
+						fwrite(buff,0xffffff,1,output_bios);
+						fclose(output_bios);
+					}
+					
+					printf("\n\n");					
+					
 				}
 				
-				printf("\n\n");
+			
+
 			}
 		}
 		
diff --git a/thinkpad_unlock_bios.exe b/thinkpad_unlock_bios.exe
index f68bad4..87d9ef2 100644
Binary files a/thinkpad_unlock_bios.exe and b/thinkpad_unlock_bios.exe differ