You can't install the program either because the installation package is corrupted or the process is blocked by your security program. In order to solve the issue, I suggest you temporarily disable your antivirus and download and install the application from an official source. If you still have issues, I suggest you update Windows Installer. On Windows XP or below, you can use the package provided by Microsoft in order to update it. If you're using Windows Vista or above, update it through Windows Update.