Best of all, WampServer is available for free (under GPML license) in both 32 and 64 bit versions.

How can I tell if my WAMP is 32 or 64 bit?

On the processes tab locate the WAMPServer process. If it is running as a 32-bit process it was say "(32 bit)" after the name. If it doesn't it is a 64-bit process.

How can I download WAMP 32 bit?

For installing Wamp server v2. 2 on a Windows 7 32-bits desktop computer or laptop, download this zip file: wampserver2-2. zip and extract it to any directory on your desktop computer or laptop. This will create an executable file named: "wampserver2.