It was my browser, Mozilla Firefox.
From their website:
"Firefox uses data from Google's "Safe Browsing" project to assess the reputation of websites and downloads. Every so often Google changes the data it supplies, for example, it may be flagging potentially unwanted programs in addition to actual malware.
For the future, the developers are considering an option to override the block and get the file anyway. It probably will be at least a few months before that appears because security-sensitive changes take time to design.
For now, if you think these file blocks are "false positives" and that the files actually are safe, you could do one of the following:
(1) Download the file using a different browser (yikes)
(2) Download the file using a downloader add-on that bypasses this security check. I heard about this in another thread but haven't tried it myself (and also, I don't know which add-ons to trust for this!).
(3) Disable the Safe Browsing feature temporarily to get the file, then turn it back on. There is a checkbox in the Options dialog:
"3-bar" menu button (or Tools menu) > Options > Advanced
On the Security tab, it's the "Block reported attack sites" checkbox. The other checkbox relates to phishing sites and I don't think it affects downloads.
Sorry I don't have a better suggestion at the moment."
So I (yikes) tried MicroSoft Internet Explorer.
It didn't block the download. It just wouldn't even start it at all. It instead opened a new page selling MicroSoft products. (So very MicroSoft)
It would appear that MicroSoft is working along the lines of Mozilla with Google here.
Tried Opera.
It got it.