This is about a 70 MB file, which then expands the setup files of slightly greater cumulative size. Note that this version is best for users who want to download IE 5.x once and then install it on a variety of computers. Once you have Internet Explorer 5.x installed, you may want to consider upgrading the included encryption components. Encryption is used to make sure that transmissions of information can't be intercepted and read. Encryption works by scrambling the information sent between your web browser and the web server you're visiting.
Encryption strength is measured in bits, and a higher bit level is more secure.
Some online banking sites require 128-bit encryption. You should never buy something or provide sensitive personal information on the web without some level of encryption present.