What Causes a DNS Error?

Updated February 21, 2017

A DNS, or domain name system, error occurs when one portion of a network, such as the Internet, is not connecting properly to another portion of the network. This can occur because of a wide range of issues, from quick, easy-to-fix problems to more complex situations. DNS errors are one of the most common errors users receive while surfing the Web.

Network Down

One of the most common problems associated with a DNS error is a down network. A variety of issues can cause a network to go down. A single server in the system may not relay the information correctly to the next server. A setting may be wrong, or something as simple as a cord connected incorrectly to an added server can cause a DNS error.

DLL Issues

If you've checked all the basics and you're still receiving DNS issues, you could have a DLL problem. A DLL, or dynamic link library, connects various items throughout a program together, creating a modular-like effect to save space and run more efficiently. Problems occur with the system when an update or other addition to the system overwrites one of the connections in the initial DLL, causing the system not to run at all. If the program with the DLL error is part of your website or is running through your website, a DNS error can appear to people viewing the site.


If you're suddenly getting a DNS error all the time when visiting sites you go to regularly, malware may be at the root of the problem. According to SearchSecurity, some malware programs are created with JavaScript. By simply clicking on a link, you can download malware to your computer and compromise the system. Run anti-malware programs regularly to keep the problem from occurring. If you suddenly notice a problem, run your anti-malware program at home.

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About the Author

Sienna Condy began writing professionally in 2001 while attending the University of Cincinnati, and she's been at it ever since. Since graduating, she's written everything from marketing materials to articles on removing stains. Today, she enjoys writing about weddings, legal issues, science, health and parenting.