Internet Explorer 1

Internet Explorer is Microsoft's venture into the Web Browser market. The initial version of Explorer was incarnated from Spyglass Mosaic which Microsoft licensed for a modest quarterly fee and a share of the non-Windows product revenues. As Microsoft decided to distribute Internet Explorer "free of charge" with their Windows operating system, they were able to avoid most royalties. This resulted in a lawsuit and a US$8 million settlement in January 1997. Being included in Windows since Windows 95 and beyond, it quickly overtook Netscape in the first Browser War and retained ~95% of market share until the early 2000's when popular alternative browsers such as Mozilla Firefox came to market sparking the 2nd browser war. Internet Explorer was long known for disobeying set web standards by the W3C until version 9 when Microsoft took a new commitment to HTML5 and web standards.

Release notes

This was the first version of Internet Explorer which was a slightly tweaked Spyglass Mosaic. IE 1.0 shipped as part of the Internet Jumpstart Kit in Microsoft Plus alongside OEM versions of Windows 95.

Internet Explorer 1.5 was introduced slightly later for Windows NT and supported HTML tables.

Installation instructions

Installer package available for Windows 3.1 and the original retail Windows 95. The original release will not install on Windows 95 OSR2 (which has IE 3) or Windows 98 and beyond as they all contain newer versions built in.

Product type
Application Web Browser
Release date
End of life date
Minimum CPU
80386 DX or better
Minimum RAM
Minimum free disk space
User interface
Download count
54 (10 for release)


Download name Version Language Architecture File size Downloads
Microsoft Internet Explorer 1.0 (4.40.308) (3.5) 1.0 (4.40.308) English 1.02MB 9
Microsoft Internet Explorer 1.5 (4.40) [Windows NT 3.5] 1.5 (4.40) English 617.81KB 1


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