WinRAR 4.20 Publisher's Description

WinRAR is a 32-bit Windows version of RAR Archiver, the powerful archiver and archive manager. WinRAR supports decompression of ZIP archives created using Zip64 format extension. Zip64 was introduced to remove original ZIP format limitations on archived file size. WinRAR's main features are very strong general and multimedia compression, processing of non-RAR archives, long filename support, programmable self-extracting archives (SFX), damaged archive repair, authenticity verification, embedded file comments, and encryption. This beta version of WinRAR includes an integrated GUI skinning engine. New options in "Advanced" part of extraction dialog:
a) "Delete archive" options allow to delete extracted archives;
b) "Check authenticity information" option controls processing of authenticity information in RAR archives.

-Now it is possible to change WinRAR's look by installing interface themes.Theme files are RAR archives, just open them in WinRAR to install. You can manage installed themes using "Options/Themes" menu.
-Added support of multivolume (multipart) CAB archives.
Wait if other WinRAR copies are active" option in "Advanced" parts of archiving and extraction dialogs.
If enabled, it waits while other WinRAR copies are creating, modifying or unpacking an archive and starts the operation only when other WinRAR tasks are complete. If you are going to perform several archiving or decompressing tasks, such queued execution can help to reduce the amount of disk seeks and improve overall performance.

Security changes:
a) WinRAR shell does not allow to run *.pif files. Archived PIF files is one of typical ways for computer viruses to distribute;
b) WinRAR shell does not allow to run files having 5 or more continuous spaces in the name. For example, "calc.txt .exe". Viruses frequently add such spaces to confuse users and hide the real extension. WinRAR shell removes these continuous spaces except first and last also when displaying names of such files in the file list.
In Windows XP WinRAR highlights the sorted column in the file list using the different color, like it is done in Windows Explorer.