Visiting the Dropbox web page breaks my PC's WiFi.

Hello. There are many people having similar problems to Keith.  Below is a Reddit thread on this issue. I will attempt the workaround Keith employed.

However, it might be helpful for the Dropbox engineers to contact Avast, Norton, and others because many people aren’t savvy enough to handle this themselves.

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Hey Keith15! Sorry for the nudge. 

Did you perhaps find something more regarding your antivirus? Are you still having issues with the Dropbox website affecting your WiFi connection?

Okay,

So I can confirm it was Avast. Switching it off and then accessing Dropbox works. 

I've added the following exceptions to Avast now and it works so hopefully it stays that way. 

https://www.dropbox.com/*

https://dropbox.com/*

Dropbox sync client path
C:\Program Files\Dropbox

Thanks everyone for helping. 

Thanks for checking that, Keith15, and we'll wait for your update!

Hi,

This is most likely it as my work PC, which uses the same antivirus (Avast Business Antivirus) just had the same problem. The fact that two separate PCs on completely different networks has the same problem points to that. I'll investigate further and let you know. 

Hi Keith15, in this thread, this user stated that Norton Antivirus might've caused the issue on their device. Do you happen to that that installed on your machine as well?

Hi Keith, what happens if you disable your firewall for a second then try to load a new page, then reenabling it? i had the same issue and that fixed it for me. i suspect its the ping for the dropbox app being rejected by the firewall breaking your wifi

Thanks for keeping us in the loop, Keith, and for giving that a go!

In this case, you may need to check this with your ISP directly, to see why your connection keeps getting interrupted when accessing the Dropbox website.

So I connected to my phone's hotspot for a different Wi-Fi and it worked no problem.

Switched back to my home WiFi and it breaks again. 

Hey Keith15!

Take all the time you need to test this out, and reply back to us with more info. 😇