What Is Internet Explorer 64 Bit?

Most versions of Windows are 32-bit operating systems, but a sprinkling of 64-bit systems are available. Because 64-bit processors and thus operating systems have become more prevalent, Microsoft created a 64-bit version of its Internet Explorer Web browser to most efficiently use 64-bit computing.

Incompatible Add-Ons

The 64-bit version of Internet Explorer can only use 64-bit add-ons, so the number of add-ons compatible with 64-bit IE is very small compared to the regular version of IE. For this reason, you may want to hold off making it your main browser.

Memory Protection for Safety

IE 64-bit has features that prevent some of the more common memory-related browser hacks. This protection is also available on 32-bit versions of Windows and Internet Explorer, but is built into 64-bit IE.

Usability

Some sites do not support 64-bit Internet Explorer. Microsoft also warns against making it your default browser in case you "forget" it's the 64-bit version and can't access a website. You can add a button to 64-bit IE that allows you to click it to open a website in 32-bit Internet Explorer (see Resources).

References

• EricLaw's IE Internals: Q&A: 64-bit Internet Explorer
• IEBlog: IE8 Security Part I: DEP/NX Memory Protection

Resources

• Bayden Systems: Bayden x64Button