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One more thing : because the tomcat7.exe wrapper program actually "runs" the JVM, it must match the type of JVM that it runs, in terms of 32bit/64bit version. If you try to start a 64-bit JVM with a 32-bit tomcat7.exe, it won't work, and vice-versa. This is why there are 2 several versions of the tomcat7.exe program, a : one 32-bit version and a two 64-bit version . And you for two different 64-bit CPU architectures.

One of the 64-bit versions is for the widely used "AMD64"/"x86-64" architecture (x64). If you have a 64-bit processor it is likely that you want to use this one. Another one is for the "Intel Itanium" architecture "IA-64" which is more rare (i64). You must install and use the correct one matching the JVM that you are using.

The Tomcat Service installer for Windows normally does that bundles all three versions of the service wrapper and selects one for you automatically; but if you downloade the ZIP version of Tomcat, you may have to select this by yourself, according to the JRE instance that you selected during installation. The ZIP distributives of Tomcat contain only one version of the program, so you have to select the correct distributive to download (*-windows-x86.zip, *-windows-x64.zip or *-windows-i64.zip).

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