The only way to figure this out is to do some troubleshooting, which the HughesNet reps here can guide you on. Have you done any troubleshooting on your own, and if so, what have you done so far?
This is a Dell pc. I've run their Support Assist program finding no issues. I've cleared browsing history. I've restarted the modem several times. Some times that helps and some times not. I can be browsing without problems, then without warning it will just stop. All the lights on the modem stay lit.
Wow, that's pretty bad. Are you out of data? To check that, go to this modem page: http://192.168.0.1/#!/home/status
What is the number next to State Code?
OK, moving on then. Does the issue persist if you use a different browser? Does the issue persist if you use a browser in incognito mode?
Top right corner of a Google Chrome page: there are 3 vertical dots. Click on that and then click "New incognito window." You can also open an incognito window by pressing these 3 keys at the same time: Ctrl, Shift, N.
If you use Firefox, it's basically the same method, only Firefox has 3 lines instead of three dots. The keyboard shortcut for Firefox's private mode is pressing these 3 keys at the same time: Ctrl, Shift, P.
Can I assume that an "in private" window in Edge the same thing? Hughesnet page would not load. I shut down the browsers and started over again with Edge so I could respond to you. I'll likely have to go to phone support (though I dred it). I can't keep a reliable connection online.