WinRAR is a powerful archive manager. 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.
WinRAR - What's new in the latest version:
1. Numerous fixes in Windows x64 context menu support.
2. If any other software is already associated with JAR files, WinRAR installer turns off the default state of "Associate WinRAR with JAR" option.
http://www.rarlab.com/index.htm