What is Internet Explorer and why does it matter today
Internet Explorer (often abbreviated IE) was the default web browser from Microsoft, widely known as www.internet explorer in technical references and support articles. For many users, it was the primary way to browse the web from the late 1990s through the early 2010s. Today, its relevance is largely historical and maintenance focused, because modern browsing has shifted to actively supported browsers with stronger security and performance. Understanding Internet Explorer helps explain legacy enterprise environments, compatibility requirements, and the evolution of web standards that shape current platforms.
Origin and role in the browser ecosystem
Launch and platform integration
Internet Explorer first shipped in 1995 as part of the Plus! pack for Windows 95, later becoming integral to Windows through tight OS integration. This bundling made IE a common default for users on Windows PCs, influencing how websites were designed during the 2000s. Because it was delivered via Windows updates, deployment in enterprises was straightforward, and many internal tools were built to rely on IE-specific capabilities.
Standards compliance and market impact
During its peak, Internet Explorer held a large share of global web traffic, but it also drew criticism for partial and inconsistent support of evolving web standards. Developers frequently maintained workarounds to ensure sites behaved correctly in IE while supporting more standards‑compliant browsers. Over time, this inconsistency motivated broader industry alignment around open standards and testing across multiple rendering engines.
Technical profile and architecture
Rendering engine and compatibility layers
Internet Explorer uses a proprietary layout engine (Trident) to render web pages. Over successive Windows releases, Microsoft introduced compatibility modes and document modes to emulate older behaviors or align closer with standards. These modes are helpful for legacy applications but add complexity, because they can cause pages to render differently depending on how a site invokes IE features.
Performance, security boundaries, and sandboxing
Compared with newer browsers, Internet Explorer generally offers slower JavaScript execution, less efficient memory use, and fewer modern web platform features. Security updates are issued while the browser remains supported, but deprecated versions stop receiving patches, increasing risk. Modern security features such as site isolation and advanced sandboxing are limited or absent in older IE versions, making it less resilient against certain classes of attacks.
Retirement timeline and version landscape
Microsoft announced the retirement of Internet Explorer in mid‑2021, directing users to the new Chromium-based Microsoft Edge. Specific milestones varied by Windows version, and organizations with legacy dependencies could defer final retirement under Microsoft’s supported lifecycle policies. Below is a concise timeline summarizing key dates and version contexts for Internet Explorer across major Windows releases.
| Version / Period | Date or Platform | What changed and why it matters |
|---|---|---|
| IE 6 to IE 8 era | 2001–2009 | Dominant in enterprises; limited standards compliance; security concerns. |
| IE 9, 10, 11 release window | 2011–2013 | Improved standards support; hardware acceleration; partial modern features. |
| Final mainstream support ends | January 2020 | No more non‑security updates for certain Windows versions. |
| Secure Channel (SSC) and retirements | August 2021 – mid‑2022 across Windows 10/11 | IE mode in Edge replaced direct IE use; legacy apps pointed to IE mode. |
| Full retirement in Windows | Late 2022 for many channels | IE removed as default; disabled unless launched via IE mode policies. |
Security implications of using Internet Explorer
Because Internet Explorer is no longer receiving feature updates, continued use increases exposure to unpatched vulnerabilities. Organizations that must run legacy applications in IE mode should apply all available security updates, restrict usage to isolated environments, and plan migration paths to supported browsers or compatibility layers. Relying on deprecated browser versions heightens risk from exploit techniques that target older rendering and scripting behavior.
Practical migration paths and alternatives
For legacy line‑of‑business applications
If a service only functions correctly in Internet Explorer, use Microsoft Edge IE mode, which preserves compatibility while benefiting from a more modern underlying engine and security updates. Administrators can deploy policies that open specific URLs in IE mode, balancing stability with improved platform security. Testing is essential, because subtle rendering and security behavior differences may affect form handling or ActiveX controls.
General user alternatives
- Microsoft Edge (Chromium) – the recommended replacement with IE mode for legacy sites.
- Google Chrome – strong performance, broad extension ecosystem, frequent security updates.
- Mozilla Firefox – open‑source alternative with privacy‑focused features and solid standards support.
These browsers benefit from active development, modern JavaScript engines, sandboxing, and ongoing security patches. Moving away from Internet Explorer reduces maintenance overhead and aligns with widely supported web standards.
Bottom line on www.internet explorer
Internet Explorer played a major historical role in web adoption and enterprise tooling, yet it is now a retired component with known security and standards limitations. Its formal retirement underscores the importance of migrating to actively maintained browsers like Edge, Chrome, or Firefox while using compatibility technologies for essential legacy systems. For most users and organizations, replacing direct IE usage with modern alternatives reduces risk and supports a more robust, standards‑based web experience.
FAQ
Reader questions
Can I still install Internet Explorer on new Windows versions
On current Windows 10 and Windows 11 releases, Internet Explorer is not available for fresh install. It remains accessible only through IE mode in Microsoft Edge for specific sites, and as a deprecated component for legacy purposes under supported policies.
Why do some internal tools still require Internet Explorer
Older internal tools may use proprietary ActiveX controls, specific document modes, or scripting behaviors that were standardized in IE but not reproduced identically in other browsers. Organizations address this by using IE mode or migrating applications to modern, cross‑browser stacks.
How can I check whether a site needs Internet Explorer
Try opening the site in Microsoft Edge first. If Edge fails or displays broken functionality, use the built-in IE mode for that site. Review application documentation or contact internal support to confirm whether genuine IE dependencies exist beyond compatibility workarounds.