This
might help
http://support.microsoft.com/kb/2669244
but, if you're getting the message when you try to download the file (rather than when you try to run it) there would seem to be only two possibilities:
1. You're not logged in as administrator (and your current user status prohibits downloading files). See here for how to log in as administtrator:
http://windows.microsoft.com/en-gb/windows7/how-do-i-log-on-as-an-administrator
OR
2. Your antivirus software is set to prohibit file downloads. Either go into the settings and change them or temporarily disable your security software while accomplishing the download.
If the problem occurs when attempting to download the file (rather than when attempting to install it) it's clearly got nothing to do with any incompatability between Windows 7 (or Google Chrome) and Flash Player, as you seem to suggest, because all that Windows and Chrome know about my link is that it goes to an executable file. (Until it's actually run, neither Windows nor Chrome have any idea that it's anything to do with Flash Player). If you can't download that file you won't be able to download ANY program files, so it's important to get the problem sorted out.
In the short term however, simply use another computer (or get a friend to do so) to download the file from my link. Then transfer it to your own computer (either by using external media, such as a USB memory stick, or by emailing it to your address) and run it by double-clicking on it (If that's going to present a problem, simply provide me with a temporary email address and I'll send it to you).