This is unusual. I can't install either the exe or open the zip for the XAMPP install.
Explorer hangs if I click the exe version, while the zip version says "The Compressed zipped Folder 'T:\xampp-portable-win32-1.8.3-3-VC11.zip' is invalid, which I doubt.
I'm running Windows 8.1 Update on an x64 PC. However, I tried running the zip on a Win 7 32-bit machine and received a similar message.