- 7-Zip now can update solid .7z archives.
- 7-Zip now supports LZMA2 compression method.
- 7-Zip now supports XZ archives.
- 7-Zip now can unpack NTFS, FAT, VHD and MBR archives.
- 7-Zip now can unpack GZip, BZip2, LZMA, XZ and TAR archives from stdin.
- 7-Zip now can open/copy/compress disk images (like \\.\c:) from \\.\ folder.
- 7-Zip File Manager now doesn't use temp files to open nested archives stored without compression.
- New -scrc switch to calculate total CRC-32 during extracting / testing.
- New -scc{WIN|DOS|UTF-8} switch to specify charset for input/output (default = DOS).
- Some bugs were fixed.

http://sunet.dl.sourceforge.net/sourceforge/sevenzip/7z904.msi
http://sunet.dl.sourceforge.net/sourceforge/sevenzip/7z904-x64.msi

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