How do I check whether my hardware is 64-bit capable in Windows?

Install and run Securable, it will tell you. If you get the 64 max bit length, then yes your processor supports it.

http://www.grc.com/securable.htm

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For Windows 7 and above

From https://support.microsoft.com/en-ph/help/15056/windows-7-32-64-bit-faq:

1. Open Performance Information and Tools: Clicking the Start button and then click Control Panel. In the search box (Ctrl + E), type Performance Information and Tools, and then, in the list of results, click Performance Information and Tools
2. Click View and print details
3. In the System section, you can see whether or not you can run a 64-bit version of Windows under 64-bit capable

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Example:

You can see whether you have a 64-bit or 32-bit CPU in Windows by opening the System Information window.

• If your System Type includes x86, you have a 32-bit CPU.
• If your System Type includes x64, you have a 64-bit CPU.

_{(Note that having a 64-bit capable CPU is NOT the same as having a 64-bit version of Windows.)}

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Windows 10/8

1. Right click the Start button, then choose Run.

2. Type msinfo32 and press Enter.

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Windows 7/Vista/XP

1. Click the Start button, then choose Run.

2. Type msinfo32 and press Enter

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Sources

• Computer Hope - How to determine if you have a 64-bit or 32-bit CPU
• Microsoft Support - Using System Information (Windows XP)
• How-To Geek - How to Open the System Information Panel on Windows 10 or 8