Getting a ""Exec format error" executing a 64bit process

Ruby
1

I am getting a “Exec format error” on Windows 7 64 bit when trying to
run the 7zip 64bit installer.
Same error if I use IO.popen(cmd) .

I am making a script to download and install softwares on a new
computer.
What can I do to make this work?

Thanks.

setupNewComputer.rb:
7z920-x64.msi
C:\\SetupNewComputer\\downloads\\7z920-x64.msi

Output:
C:\SetupNewComputer\downloads>ruby setupNewComputer.rb
setupNewComputer.rb:1:in ``’: Exec format error -
C:\SetupNewComputer\downloads
7z920-x64.msi (Errno::ENOEXEC)
from setupNewComputer.rb:1

C:\SetupNewComputer\downloads>ruby setupNewComputer.rb
setupNewComputer.rb:1:in ``’: Exec format error - 7z920-x64.msi
(Errno::ENOEXEC)

    from setupNewComputer.rb:1

C:\SetupNewComputer\downloads>