If you are getting the Checksum error when trying to extract a RAR archive file using WinRAR, see this post and fix the error.

ZIPmagic offers 100% free file compression functionality and is the ideal upgrade for the 500 million WinRAR users who are affected by this security flaw.

Iconic file archiving tool WinRAR has received a security update addressing a serious flaw that could let attackers run arbitrary code on affected systems.