WinRAR 是一个强力压缩工具，允许你管理和操作压缩文件。控制台 RAR 只支持 RAR格式，带有的 ".rar" 扩展名的文件。ZIP 和其他格式不被支持。Windows 用户可以安装图形界面 RAR 版本 - WinRAR，它可以处理更多的压缩文件类型。
虽然控制台 RAR 和图形界面 WinRAR 有相似的命令行语法，但是它们还有有一些不同。所以推荐使用此 rar.txt 手册用于控制台 RAR(rar.exe 在 Windows 版本的情况下)，winrar.chm 是图形界面 WinRAR(winrar.exe) 的帮助文件。
1. Changes in RAR compression:
a) RAR general compression algorithm is optimized for better
utilization of several processor cores. While some speed gain
is possible even in single processor mode, best results
are achieved in multi-core environment.
Speed gain depends on data type and average file size.
Several cores are utilized more efficiently when compressing
large files.
b) we had to increase memory requirements to achieve higher
compression speed. General RAR compression algorithm allocates
about 120 MB comparing to 40 MB in WinRAR 4.11;
c) RAR text compression algorithm cannot utilize several CPU cores
efficiently, so its performance in multiprocessor environment
is much lower than for general algorithm. Also its decompression
speed is much lower than in general algorithm regardless of
CPU number. So we decided to disable the text algorithm by default.
If you need maximum possible compression ratio for plain text data
regardless of speed, you can enable the text compression
in "Advanced compression parameter" dialog. Press "Compression..."
button on "Advanced" page of archiving dialog to access it.
You can also change this option permanently in default compression
profile;
In the command line mode the text compression can be enabled
with -mct switch;
d) "Fastest" (-m1) compression mode also supports several processor
cores now. In 4.11 it could use only a single processor core.
2. RAR general decompression algorithm speed is slightly improved,
though not to same extent as RAR compression. RAR decompression
is not able to use several processor cores, so its performance
does not depend on a number of cores.
3. Changes in ZIP compression:
a) now ZIP compression supports several processor cores resulting
in noticeably higher performance in multi-core environment.
Single CPU ZIP compression is also faster than in 4.11;
b) memory use for ZIP compression is increased to about 15 MB.
4. Recovery volume creating and processing can use several CPU cores
resulting in higher speed. Though, typically hard drive seek speed
is a limiting factor for recovery volumes, so this gain is most
noticeable when working with solid state drive.
5. Now the allowed value for -mt switch is 1 - 32,
not 0 - 16 as before.
6. "Find files" command can search data in 7-Zip archives.
Previously "Find files" did not support .7z archive format.
7. Windows 2000 is not supported by WinRAR and WinRAR self-extracting
modules anymore.
8. "Save current settings" button in "Advanced SFX options" dialog
is now available only when converting an existing archive to SFX.
Options saved with this button are applied only to convert to SFX
operation.
If you create or update SFX archive, only SFX options stored
in default compression profile are used. Options saved
in "Advanced SFX options" dialog are ignored for these operations.
支持运行环境：Windows XP/Vista/Win7
WinRAR 4.20 简体中文版 32位 下载：
（1.8MB）
WinRAR 4.20 美化增强版 32位 下载：
（2MB）
WinRAR 4.20 简体中文版 64位 下载：
（2MB）
WinRAR 4.20 美化增强版 64位 下载：
（2.2MB）
软媒小编发布过的WinRAR主题有：
1.《古朴的奢华：WinRAR主题——OrgRar》
2.《逼真的质感：WinRAR主题——Reality》
3.《继续的精彩：WinRAR主题——Web Power》
4.《古典的沉淀：WinRAR主题——Reborn》
5.《地道的精彩：WinRAR主题——Ubuntu》
6.《让你的Windows7更Metro的WinRAR主题包》
7.《WinRAR主题两套奉上：雅黑中的一抹亮色》
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