”mozilla/5.0 (windows nt” “opera/9.80 (windows nt” is part of a user agent string that you may see in your access logs. Part of that string (it is not complete) is listed in the [Most Common User Agents](https://techblog.willshouse.com/2012/01/03/most-common-user-agents/)
It is possible that this user agent string is a bot – it seem to refer to Windows XP and very frequently Windows XP useragents, especially IE6, are bots.
Here are two very common BOT useragents that are similar to the `”mozilla/5.0 (windows nt” “opera/9.80 (windows nt”` string:
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; MRA 5.8 (build 4157); .NET CLR 2.0.50727; AskTbPTV/5.11.3.15590)
And also:
Opera/9.80 (Windows NT 5.1; U; en) Presto/2.10.289 Version/12.01
If you have a browser that has a console (like google chrome) you can type `navigator.userAgent` to see what your browser’s useragent is:
