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just so i could use all the RAM i bought i upgraded to win xp 64bit about six months ago and i haven't used IE 64 bit or tried to until about two weeks ago? whats the difference between the two and is it worth them writing code for it? why can't it be my default browser? should i go back to not even knowing its there?

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— short answer: there is no different HTML/CSS/JS you need to write for 64‑bit IE. The practical difference for an everyday user is plugin and extension compatibility. 64‑bit IE runs as a native 64‑bit process and can host 64‑bit native add‑ons, but in 2009 most toolbars, ActiveX controls and browser plugins (Flash, Java, many NPAPI/COM add‑ons) were 32‑bit only, so the 64‑bit browser often appeared to “lose” functionality.

’s KB link covers the official mechanics; to add context: Windows x64 ships both 32‑ and 64‑bit IE, and the OS keeps the 32‑bit copy as the practical default to avoid breaking sites and shell integrations that expect 32‑bit add‑ons. That is why the 64‑bit copy may not act as the system default and why you’ll see missing toolbars or inactive plugins when you switch to it.

Practical guidance and troubleshooting:

  • If a page or plugin is missing, run the other IE executable (the one from Program Files vs Program Files (x86)) and retest.
  • In Task Manager 32‑bit processes are usually marked “*32”, which helps identify which IE you launched.
  • Web developers do not need separate code for 64‑bit browsers; only native plug‑in authors need to build 64‑bit versions.
  • Don’t force the 64‑bit browser to be the system default unless every add‑on you rely on has a 64‑bit build—doing so can break expected behavior.

If this is being read years later: Windows XP (including x64) and IE8 are long out of support. For security and compatibility, consider moving to a supported OS and browser when possible.

Member Avatar for Adamsappleone

Have a look;

commented: thanks, sorry for taking so long to give you some points +1
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