The downloads are not infected

Your anti virus or browser security is reading a false positive.

You need to give an exception within your security system.

If you are not comfortable adjusting your security settings to allow the download and installation, I would recommend turning them off while you install the product.

Chrome as well as firefox regularly block downloads for no reason.

Software, scripts and even graphics pack can read a false positive.

If you use these browsers you most likely will never get many downloads.

I have gone to using Internet Explorer as a result of this.

You can get your downloads by following this site:

"Fix Chrome’s Safe Browsing feature blocking some downloads in the browser."

http://www.ghacks.net/2014/07/15/fix-chromes-safe-browsing-feature-blocking-downloads-browser/

Bypass Firefox’s Blocked: May contain a virus or spyware message

http://www.ghacks.net/2014/11/19/bypass-firefoxs-blocked-may-contain-a-virus-or-spyware-message/