This might help...
http://windows.microsoft.com/en-gb/windows-8/zip-unzip-files
WinRAR is NOT free, nor is it freeware. It WILL, however, still function after the trial period is up. You'll just have messages telling you that you haven't paid for it.
The current price for WinRAR is € 29.95.
There are also FREEWARE alternatives to use besides WinRAR. One of these is PeaZip
Source(s):
https://answers.yahoo.com/question/index?qid=20130405141918AAWdK1q
Ignore messages and continue to use it
January 2015