That file is needed and should not be removed. Both the program file and X86 file are
required. The program file contains information needed for 64 bit. Any 32 bit applications, such
as IE 8, (32 bit), are contained in the X86 file. I have both files on my computer.
Below is another thread about the x86 file, giving some additional information. Program files/Program files(x86) HELP
Probably, only the first page will be of interest.
Please post if you have any other questions or concerns.