Software On Internet

  When you download software from the Internet, why is it important to verify the MD5 hash value? Describe some first and important steps you would use to verify a MD5 checksum of downloaded software. Are there tools built into the operating system that will check the MD5 sum? Can you recommend a website with MD5 checkers as a potential resource? What would happen if you downloaded new software, and confirmed that the MD5 value does not match the site? What steps would you take to resolve this issue?