64-bit applications are usually installed in the “C:\Program Files” folder, while 32-bit applications install themselves in the “C:\Program Files (x86)” folder.

If your version of Windows is 64-bit, you're able to install both 32-bit and 64-bit software programs, so there are two different "Program Files" folders on your computer. However, 32-bit versions ...

If the box next to the entry is checked, it means your 64-bit version of Explorer is set to process Web pages in 32-bit mode. If the box is unchecked, Explorer will process pages in 64-bit mode.

64-bit computing is replacing 32-bit, mainly because 64-bit enables faster hardware and software. Here's the rundown on the ongoing 32-bit vs. 64-bit debate.