WAMP server is a platform tool for serving PHP applications on Windows. It includes a combination of Apache, MySQL and PHP service which can help developers test or run PHP applications with minimal setup.Sometimes one would first have a 32 bit version of WAMP installed and a few applications have been configured. But later s/he would mistakenly installed a 64 bit version of WAMP and somehow the 32 bit version configuration is overwritten. This causes a problem where the old applications configured for 32 bit WAMP will not function any more even if the 32 bit version of WAMP server is started....

By default, VirtualBox only allows to install 32 bit OS on it. But sometimes, 64 bit OS is wanted for specific uses such as running platform specific tests. To allow installing 64 bit OS on VirtualBox. Below information is needed.Here is the official documentation about 64 bit OS:VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met:You need a 64-bit processor with hardware virtualization support (see the section called “Hardware vs. software virtualization”).You must enable hardware virtualization ...

ARM has disclosed technical details about its new v8 architecture - the first to include a 64-bit instruction set - at ARM TechCon 2011 in Santa Clara, California.The next-gen architecture will expand the reach of ARM processors in the consumer and enterprise markets where extended virtual addressing and 64-bit data processing are required.According to ARM CTO Mike Muller, ARMv8 architecture consists of two main execution states: AArch64 and AArch32. 

The AArch64 execution state introduces a new instruction set, A64 for 64-bit processing, while the AArch32 state supports the exist...