I’m getting more and more questions if SDC Unpacker can handle splitted archives.
The answer is… No, or even Yes 
The unpacker can’t handle this kind of files by itself, but there is a simple workaround – you have to merge sdc parts before you run the unpacker. You can use “copy” command, e.g.:
copy /b archivepart.01.sdc+archivepart.02.sdc mergedarchive.sdc
Now you can use sdc unpacker to decrypt mergedarchive.sdc
Simple, isn’t it?
26 comments
26 Comments. Add your own
thnx for the fast answer and your program! it helped me!
I used another tool before and it didn’t worked for me, but your solution does!
thank you one more time!
I’ve downloaded a vista x64 in a iso.sdc package, but the unpacksdc.exe doesnt work (it does with the xp 64 cd image)
the message is the folowing:
sdc version b3
proper CRC32: A759D1BA
computing CRC32…
Computed CRC32: 4CE70B78
Wrong CRC!. Hit Enter to exit…
anyway great job!!!!
Thank You!!! God, I can’t tell you how incompetent our administration is here. Why can’t Microsoft just provide a uniform MSDN site like the kind you get with a proper subscription? Anyhow, with this tool, I’m finally able to reinstall a much needed office application. It was funny, but I was thinking the same thing as you, after disassembling an old downloader. You saved me a couple of hours of pouring over zlib docs.
Have tried this method on VS2008, but no success. The CRC check fails, so I’m suspecting it might be the SDC file itself, but it seemed to download fine…
Thank you for this program Imagi.
In Polish: “Dziekuje” 
keep getting wrong CRC check
Manuel? How did you get it to work???
thanks
@David
I used this trick and unpacked VS2008 without problems, eg:
UnpackSDC 1.0 (c) imagi
SDC version: B4
Proper CRC32: AC6235FF
Computing CRC32…
Computed CRC32: AC6235FF
CRC OK
Unpacking: EN_Visual_Studio_2008_Prol_x86_x64wow_DVD\en_visual_studio_2008_profe
ssional_x86_x64wow_dvd.iso
i cant descompress visual studio 2008 version B3, it say Wrong CRC! any solution!?.
Fixed, i downloaded it from other Site MSDNAA, with SDC Version B4, and it work correctly ^^.
PD: this unpacksdc work perfectly with B4 Files xD.
Hi
I also got the same error, how to get rid of this please help…:(
D:\>unpacksdc VistaSP1.sdc D:\
UnpackSDC 1.0 (c) imagi
SDC version: B4
Proper CRC32: 51293959
Computing CRC32…
Computed CRC32: 9953A102
Wrong CRC!. Hit Enter to exit…
When trying to unpack Exchange Server 2007 I get the following error (error texts in German):
UnpackSDC 1.0 (c) imagi
SDC version: B4
Unbehandelte Ausnahme: System.OverflowException: Die arithmetische Operation hat
einen Überlauf verursacht.
bei unpacksdc.Program.Main(String[] args)
What can I do? Is this because the file is about 5.15 GB?
I tried opening unpacksdc, it only showed a black command box then quickly disappeared. Whats the problem? Please help
@James
It is commandline so you need to run it from there
Worked like a charm.
If anyone has a MSDNAA student username and password please mail. me
In return
I will give you vista enterprise retail keys.
http://oknos.fi.muni.cz/EN_Windows_Vista_with_SP1_x64_DVD.01.sdc
http://oknos.fi.muni.cz/EN_Windows_Vista_with_SP1_x64_DVD.02.sdc
Can anyone try these files and extract it using above method.
Thanks
i have the same problem as above, when copy /b two sdc part together, it simply do not crc match… thus fail to unpack, any idea or solution ?
Hello, everyone, thanks for this maravilhasa tool, but I’m having a problem, I use the UnpackSDC with only the option “skipcrc.” Without it appears a wrong CRC. ” But after making the unpack when you try to open the image says it is in a format known by the windows or corrupt. I tried to use the Daemon Tool, Nero Virtual Drive, and even recorded a DVD with the image but does not open. Any suggestions?
i have the same problem with this. it says Wrong CRC! … what was the solution? please help
the unpacksdc i downloaded doesnt work
cmd screens just comes and blinks off and goes
plz man can u help me out on this
can u give a detail step wise analysis how to extract the files from sdc format
hope u wud replay back
plz………………
Dear sir,
i am not able to open your unpacksdc
when i double click on it. its giving error
the application failed to initilize properly
(0xc0000135) click on OK to terminate the application
pls send me the solution on my mail i would be thankful to you….i have more than 3 SDC file downloaded from MSDN library..
Waiting for your responce
Regards
Ashokathegre8
Hi All,
Please check .Net Framework 2.0 or later installed. UnpackSDC will not work without .NetFramework
u will get the below error due to absence of .NetFramework 2.0
“the application failed to initilize properly
(0xc0000135) click on OK to terminate the application”
Also
Copy the .SDC file & UNPACKSDC app to the home directory.
use in home directrory(C:\Documents and Settings\XXX)
ex:
unpacksdc .sdc c:\xx
xx > is some name should be entered for unpacking the .sdc
After process u will see a xx folder with iso created inside.
Thanks
Barani
I’ve problem to unpack Exchange Server 2007. I thing problem is with 64bit size after copy /b …. 5 531 953 853 bytes
i have problem in SDC Unpacking I have tow SDC files it is windows 7
the links of files :
http://software.msdnaa.net/ELMS/ENGLISH/en_windows_7_beta_dvd_x86_x15-29073.01.sdc
http://software.msdnaa.net/ELMS/ENGLISH/en_windows_7_beta_dvd_x86_x15-29073.02.sdc
but the problem after these tow files is become one file and I wont to Unpacking this file it show me this massage
” wrong CRC ! . hit enter to exit … “
Thanks for this great utility. Version 1.1 works but with a minor bug. I had a typo in my file name. UnpackSDC crashed with an error.
An unhandled exception of type system.io.FileNotFoundException occurred in mscorlib.dll
Additional information: Could not find file
wrong way to do it:
unpacksdc \en_windows_vista_x86_cd3_X12-54428.iso.sdc c:\ skipcrc
Correct one:
unpacksdc en_windows_xp_pro_64bit.iso.sdc c:\SDC
only use spaces to separate unspacksdc, target and folder.
Cheers!!