I suggest to use 7Zip, it’s open source, manage quite all compression standard, and it has a great command line support.
From command is:
7z.exe e *.zip
7z.exe is the command,
e stands for extrat
*.zip stands for “all zip files”
If you need to force overwrite all files, add -aoa at end of command.
A sample output extracting two zip files:
C:\test>7z.exe e *.zip
7-Zip 4.65 Copyright (c) 1999-2009 Igor Pavlov 2009-02-03
Processing archive: test_doc.zip
Extracting test_doc.pdf
Everything is Ok
Processing archive: test_image.zip
Extracting test_image.png
Everything is Ok
Archives: 2
Files: 2
Size: 114950
Compressed: 101355
Bye
