Determining Processor Architecture

by Mitch Tulloch [Published on 13 June 2007 / Last Updated on 13 June 2007]

How to determine your processor architecture from Windows.

So you’ve just inherited a bunch of Windows Server 2003 servers from the last guy that worked at this company, and you’re trying to inventory the configuration of each system as the previous guy never kept any records (which is probably why he got fired). How can you determine whether a given server has the 32-bit or 64-bit version of Windows Server 2003 installed on it?

Here’s how: open a command prompt and type echo %processor_architecture% and you’ll get x86 or x64 depending on the version of Windows installed.


Mitch Tulloch was lead author for the Windows Vista Resource Kit from Microsoft Press, which is THE book for IT pros who want to deploy, maintain and support Windows Vista in mid- and large-sized network environments. For more information see

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The Author — Mitch Tulloch

Mitch Tulloch is a well-known expert on Windows Server administration and cloud computing technologies. He has published over a thousand articles on information technology topics and has written, contributed to or been series editor for over 50 books.

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