Though many operating systems offer built-in virus software to disallow unauthorized applications, there are limited ways to counter user-initiated downloads that contain harmful or corrupt files. Fortunately, there are a few techniques to monitor your own downloads and minimize the chance of viruses slipping through.
1. Never accept an unsolicited download: Creators of spyware and malware have become very creative over the years, disguising their programs as a helpful solution to a common problem. Many sites will pop up a replica of the Windows warning box, telling you your computer is not secure. Always avoid these pop-ups and immediately cancel any unauthorized downloads.
2. Verify the credibility of your downloads: Even if you have chosen to initiate a download, you need to be certain the hosting site is reputable and the file is exactly what it’s said to be. The best way to determine if your download is legitimate is to check the information of other users. Type the name of the site, the download you are trying to initiate, and the word “virus” into a search engine. Chances are if someone else has fallen into that trap, they will warn others.
3. Check the file with anti-virus software: While there are some programs that burrow into your registry once they’re downloaded, most heavy-duty malware consists of an executable file that must be run to cause serious damage. For this reason you should never open a downloaded file before scanning it with anti-virus software. If a problem is detected, you can quarantine the file and hopefully erase any damage before it becomes permanent.
It may seem unnecessary, but taking a few extra minutes to check on a file and prepare your system for downloads can save hours of potential agony in trying to remove a stubborn virus.