I recommend to download powerarchiever from the website www.softpedia.com. You can check other software like winzip,winrar,7-zip etc.. Powerarchiever is good for compression, and it support all kind of compression. Winrar is very fast in extraction.
PowerArchiver is also a product you have to pay for. I would recommend going with 7zip at the first instance as it's FREE and Open Source, so it means you get no annoying nag screen or you have to pay for it.
FYI: You can download PowerArchiver directly from http://www.powerarchiver.com
instead of softpedia.com.