Hy.
Because many of you might have problems with third party software
here are some simple steps to get a licensed WinRar.
Go here:
http://rarlab.com/download.htm
Download the latest version depending on your system (32 bit or 64 bit).
If you are uncertain install the 32 bit version.
Download the registration file from here:
http://www95.zippyshare.com/v/GW0GwGQm/file.html
Unzip and paste rarreg.key in the installation folder:
For windows 10:
C:\Program Files\WinRAR or C:\Program Files (x86)\WinRAR
Works every time with all the versions. No need to download visuses from torrent/DOWNLOAD sites.
Enjoy

I am using this file since 2010 and I never had a single problem. No errors now or in the future.