I've tried to open several different .exe files, and keep getting the same error. I've gone to several Windows help/ troubleshooting sites to no avail. My OS is Windows XP SP3 and browser is Firefox Ver. 3.5.9. I'm not able to install any other browsers on my system to test if this is Firefox causing the problem because the files won't open, and don't have IE on my computer. I've tried manipulating the download options, shutting off add-ons, turning off pop-up blockers, and turning off antivirus software, and nothing seems to work. I'm wondering if this is a registry problem or something else. Any help will be greatly appreciated. Thank you.