1. If Windows User Account Control prevents extracting or archiving
commands to create files in system protected folders, WinRAR attempts
to start its another copy with administrator privileges to complete
the operation. It is necessary to confirm privileges elevation
in response to User Account Control prompt to allow such second
WinRAR copy to run.

2. You can drag files in Explorer with right mouse button, drop them
to some folder and select WinRAR archiving commands in context menu
to create an archive with these files in the destination folder.

3. It is possible to use WinRAR.ini file instead of Registry to store
WinRAR settings. You may prefer such approach if you plan to install
WinRAR to removable media, such as USB flash drive, and then run it
on different computers.

See "WinRAR.ini file" topic in "Configuration settings" chapter
of WinRAR help for details.

4. Added extraction support for ZIP and ZIPX archives using
XZ compression algorithm.

5. If ZIP or ZIPX archive contains any compression algorithms except
usual "Store" or "Deflate", algorithm names are displayed
in "Version to extract" field of archive information dialog.
Algorithms with names unknown to WinRAR will be assigned "m<num>"
name, where "num" is a compression algorithm numeric identifier.

6. "Open with WinRAR" command is available in Windows context menus
for archive formats supported by WinRAR. It can be turned off
with "Open with WinRAR (for usual archives)" option in WinRAR
"Settings/Integration/Context menu items..." dialog.

7. Command line RAR can read the default set of switches from rar.ini
file stored in RAR program folder. Previously it was possible to
define only the same set of switches for all RAR command with
"switches=<switches>" string. Now rar.ini also allows to specify
separate switch sets for individual RAR commands using
the following syntax:

switches_<command>=<any RAR switches, separated by spaces>

For example:

switches_a=-m5 -s
switches_x=-o+

8. Command "ch" supports switches -tl, -cu, -cl also for ZIP archives.
Previously "ch" allowed these switches only for RAR archive format.

9. For archive formats lacking file time information, such as .bz2,
.xz and .Z, WinRAR sets container archive modification time
to extracted files. It does not apply to tar.bz2, tar.xz and tar.Z,
which use file time stored in tar headers.

10. "Keep broken files" extraction option is supported for bzip2 archives.

11. WinRAR icon in Windows context menus is scaled up correctly
in high DPI screen modes such as 150% or 200% of normal text size.

12. It is possible to disable WinRAR "Benchmark" command with
"Benchmark" variable of HKEY_CURRENT_USER\Software\WinRAR\Policy
Registry key. In multi-user environment "Benchmark" command might
abuse shared computational resources. See "Registry variables" topic
in "Configuration settings" chapter of WinRAR help for more details.

13. Additionally to "sfxcmd" variable containing the entire command line,
SFX module sets "sfxpar" variable containing command line parameters
only, without leading SFX module name. These variables are set before
starting a program specified in "Setup" command.

14. File overwrite prompt in console RAR displays the size and modification
time for existing and new files.

15. When archiving from stdin with -si switch, RAR sets the current system
time to modification time of archived file. Previous version did not
set this time at all.

16. It is possible to use -si and -v<size> switches together. Previous
versions did not allow to create volumes when archiving from stdin.

17. Warning is issued when starting unpacking 4 GB or larger file
from RAR or ZIP archive to FAT32 patition, so user may cancel
the operation. FAT32 does not support files of such size.

Also this warning is issued when starting to create RAR archive
with "Store" (-m0) method if estimated archive size is 4 GB or more.

18. "Select all" button in "Settings/Integration" dialog is renamed to
"Toggle all". Now it deselects archive formats if all they are
already selected.

19. "Delete archive" extraction option correctly removes all .zip and .7z
volumes. Previously it removed only the first volume in the set
for these archive formats.

  1. "Drag and drop context menu" options in "Settings/Integration/
     Context menu items" dialog allow to disable WinRAR archiving
     and extraction commands in context menu displayed after dragging
     and dropping files with right mouse button.

  2. If winrar.ini file is present in the same folder as WinRAR installer,
     winrar.ini will be copied to WinRAR program folder after completing
     installation.

  3. While previous versions could produce RAR5 volumes of slightly
     smaller than requested size sometimes, such situation is less
     likely now. In most cases volume size equals to specified by user.

  4. Now by default WinRAR skips symbolic links with absolute paths
     in link target when extracting. You can enable creating such links
     with "Allow absolute paths in symbolic links" option on "Advanced"
     page of extraction dialog or with -ola command line switch.

     Such links pointing to folders outside of extraction destination
     folder can present a security risk. Enable their extraction only
     if you are sure that archive contents is safe, such as your own backup.
     
  5. Bugs fixed:

     a) WinRAR 5.20 issued unnecessary user account control (UAC) prompt,
        when running an executable from archive stored in UAC protected
        folder. Since nothing is extracted to folder containing an archive
        in such case, UAC prompt is not needed;

     b) WinRAR could overwrite files with read-only attribute only
        when unpacking RAR and ZIP archive formats. Now it is also
        implemented for other archive formats supported by WinRAR;

     c) "Elapsed time" and "Time left" were displayed incorrectly
        when applying "Convert" command to multiple archives
        and enabling "Add recovery record" option.