Follow these steps:
a. Open Internet Explorer by clicking the Start button . In the search box, type Internet Explorer, and then, in the list of results, click Internet Explorer.
b. Click the Tools button, and then click Internet options.
c. Click the Security tab.
d. Now click on Trusted sites and then click on Sites.
e. Enter the Website URL and click on Add. for example, if you want to download software from google.com, you can add https://www.google.com and https://*.google.com into trusted site list; if you want to download software from Microsoft, you can add http://www.microsoft.com and http://*.microsoft.com into Trusted sites list, then refresh browser.
f. When you are finished, click on Close
h, Refresh your browser, then you can download software from the website you added.