Microsoft Windows operating systems (such as Windows 7, Vista and XP) come in two versions–X86 and X64 (32-bit and 64-bit). According to Microsoft, “The main differences between the 32-bit versions of Windows and the 64-bit versions of Windows relate to memory accessibility, memory management and enhanced security features.” Windows 64-bit systems require 64-bit drivers, but most 32-bit software programs are still compatible. These systems often have two versions of Internet Explorer installed–one an X64 program and the other X86. If your 64-bit (X64) Internet Explorer is not working, you may need to run the 32-bit (X86) version instead. Tips Writer Bio
