Member Avatar for BobLewiston

Windows XP Pro is a 32-bit op sys, right?

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Short answer: yes — the common retail Windows XP Professional is 32‑bit (x86/IA‑32), but Microsoft also released 64‑bit versions. The consumer/server 64‑bit SKU most people mean is "Windows XP Professional x64 Edition" (for x86‑64 / AMD64 / Intel 64), and there was a separate Itanium (IA‑64) edition for high‑end systems. (en.wikipedia.org)

Clarifying a couple of points from the replies: likely meant x86_64 (often written x64 or AMD64) rather than the typo that showed up in his post. x86_64 (AMD64 / Intel 64) is not the same as IA‑64 (Itanium) — binaries and drivers compiled for one will not run on the other. Also, 64‑bit XP requires 64‑bit drivers for kernel/hardware components; 32‑bit drivers are not usable on an x64 install. (en.wikipedia.org)

If you want to verify an installed copy without using the GUI method mentioned, these command options work (run from a Command Prompt or Start→Run): 

wmic os get OSArchitecture
wmic computersystem get SystemType
echo %PROCESSOR_ARCHITECTURE%
echo %PROCESSOR_ARCHITEW6432%
msinfo32

Note the caveat: %PROCESSOR_ARCHITECTURE% can report x86 when you're running a 32‑bit process on 64‑bit Windows (WOW64); checking PROCESSOR_ARCHITEW6432 or using wmic os get OSArchitecture is more reliable. Presence of a C:\Program Files (x86) folder is also a quick indicator of 64‑bit Windows. (ss64.com)

Practical note: 64‑bit Windows XP is now long out of mainstream use and support; Windows XP reached end of extended support on April 8, 2014. If the goal is security or software/driver compatibility, consider moving to a modern, supported OS rather than relying on aging XP builds. (learn.microsoft.com)

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Member Avatar for jbennet

Yeah it comes in both x86_84 (AMD64) or IA64 (Itanium) flavours

Member Avatar for baltazar

Yes, comes in both flavours. Best way to be certain is to check it out.

Here is ow you do it.

1. Right-click on My Computer
2. Go to Properties.
3. Look under System. It should say stuff like Microsoft Windows XP... Version...

If it is a 64-bit version it will say so in the System section.
If 32-bit version, it won't say anything.

Hope this helps.

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