congnt92 Posted May 5, 2013 Share Posted May 5, 2013 Hi allI want to modify bootmgr windows 8 where value bcd change to bc1, bc2... How can I do it? Link to comment Share on other sites More sharing options...
congnt92 Posted May 6, 2013 Author Share Posted May 6, 2013 Nobody can help me? Link to comment Share on other sites More sharing options...
JFX Posted May 10, 2013 Share Posted May 10, 2013 (edited) You will need bmzip and PEChecksum by Jeffrey BushFirst decompress bootmgrbmzip bootmgr bootmgr.exeJoakim has found out how to Modify bootmgr of Windows 8Here you have the adresses for bootmgr.exe version 6.2.9200.16384 (RTM)So use a HexEditor and change following bytes in bootmgr.exe.0000066B: 0F 900000066C: 88 900000066D: A3 900000066E: 02 900000066F: 00 9000000670: 00 900002957A: 74 EB000295A1: 75 EBAt adress 8345C you have the \Boot\BCD string that you can change.Then use PEChecksum to update the Exe checksumPEChecksum bootmgr.exeAnd Finally recompress bootmgrbmzip /c bootmgr.exe bootmgrbootmgr-tools.zip Edited May 10, 2013 by JFX Link to comment Share on other sites More sharing options...
congnt92 Posted May 11, 2013 Author Share Posted May 11, 2013 (edited) thanks JFX. I hex edit successed. God bless you :angel But after modified bootmgr, when I boot setup windows 8, prompt stopped about 5 seconds. Then the installation can be continue. How do I fix it ? Edited May 11, 2013 by congnt92 Link to comment Share on other sites More sharing options...
JFX Posted May 12, 2013 Share Posted May 12, 2013 Are you sure that delay comes from bootmgr?It boots instantly for me! Link to comment Share on other sites More sharing options...
congnt92 Posted May 12, 2013 Author Share Posted May 12, 2013 I'm sure. Because if I use bootmgr original, no matter what happend. You can send me your bootmgr file after modified? Link to comment Share on other sites More sharing options...
bphlpt Posted May 13, 2013 Share Posted May 13, 2013 Might be better to post yours so we can see what you did wrong, and suggest ways so you can do it correctly next time.Cheers and Regards Link to comment Share on other sites More sharing options...
jaclaz Posted May 13, 2013 Share Posted May 13, 2013 Might be better to post yours so we can see what you did wrong, and suggest ways so you can do it correctly next time.It might be even better if noone re-distributes non-redistributable files through the board.Noone ever heard of hashing a file (let's say MD5) to check if it's the same as another one? jaclaz Link to comment Share on other sites More sharing options...
congnt92 Posted May 14, 2013 Author Share Posted May 14, 2013 (edited) Thanks all. Here my bootmgr after modify. I don't know what did I do wrong ?Bootmgr.rar Edited May 14, 2013 by congnt92 Link to comment Share on other sites More sharing options...
JFX Posted May 14, 2013 Share Posted May 14, 2013 @congnt92You did nothing wrong, you edit it correctly.But still i can't reproduce your problem. Link to comment Share on other sites More sharing options...
congnt92 Posted May 14, 2013 Author Share Posted May 14, 2013 thanks JFX. Now, I think I should be content with what I already have because the error does not affect the installation process. Thanks again, JFX. Link to comment Share on other sites More sharing options...
JFX Posted August 29, 2013 Share Posted August 29, 2013 Here you have the addresses for bootmgr.exe version 6.3.9600.16384 (RTM)0000065E: 0F 900000065F: 88 9000000660: AE 9000000661: 02 9000000662: 00 9000000663: 00 900002B1C1: 74 EB0002B1EB: 75 EBAt address 8AF90 you have the \Boot\BCD string that you can change.@ModsMaybe this topic would be better places in WinPE or Multi boot sub forum. 1 Link to comment Share on other sites More sharing options...
jaclaz Posted August 18, 2014 Share Posted August 18, 2014 Just wanted to thank JFX for providing a working compiled bmzip.exe and clear, easy to follow, instructions on it's use. It took me some (too much ) time to FAIL in replicating with the tools provided directly or indirectly here:http://reboot.pro/topic/16915-bootmgr-recompiler/and all of 3 (three) minutes to succeed with the version of the tool JFX provided. jaclaz Link to comment Share on other sites More sharing options...
JFX Posted August 19, 2014 Share Posted August 19, 2014 JFYI, instead of PEChecksum.exe one can also use Unsigntool. It strips the no longer needed digital signature and fixes the PE Header checksum. Link to comment Share on other sites More sharing options...
JFX Posted August 22, 2014 Share Posted August 22, 2014 (edited) So for everyone how doesn't like command line or hex editing, I've updated my old zbootmgr tool. http://1drv.ms/1plzVcu Edited August 22, 2014 by JFX 1 Link to comment Share on other sites More sharing options...
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