WinRAR is a powerful archive manager (Win32, Linux, Mac). RAR files can usually compress content by 8 percent to 15 percent more than ZIP files can. WinRAR is a powerful compression tool with many integrated additional functions to help you organize your compressed archives. It can backup your data and reduce size of email attachments, decompress RAR, ZIP and other files downloaded from Internet and create new archives in RAR and ZIP file format.

Changes in Version 3.90 Beta 4:
1. New 'Shutdown' variable in 'Software\WinRAR\Policy' registry key allows to disable "Turn PC off when done" option for security reasons. Read "Configuration settings/Registry variables" for more details.
2. Program Compatibility Assistant in Windows 7 will not display an erroneous "This program might not have installed correctly" message after closing RAR SFX archives created by this beta.
3. Improved compatibility with high DPI Windows display mode.
4. Bugs fixed:
a) beta 3 did not display archiving commands in context menu if user selected several archives;
b) beta 3 did not handle 'LongLink' records in TAR archives correctly;
c) recovery record based repair did not work correctly in previous beta versions;
d) beta 3 could display a folder icon for archived files without a file extension.