Can't download files in FireFox, Chrome, and more

I spent hours trying to solve to no avail. If I try to download a file from for example it doesn't work. As soon as I try Firefox says "....could not be saved, because the source file could not be read.", Chrome says "Failed - network error", in IE, the file downloads, but after the installers download, programs like AVG or MalwareBytes do not continue to download and I get Windows errors.

I'm using Windows 10 with the latest updates and a wireless N adapter on a Dell. I uninstalled AVG in case that was the problem, but now I'm unable to download it fully again to reinstall. I temporarily disabled Windows Defender in case, but no help. I did just replace my modem with a TC-7610 with Comcast and apparently enabled IPv6 on my WD N750 router in case that is a factor. The rest of my internet works as far as I can tell with loading websites, but the downloads seem blocked for some reason.

I tried various fixes but nothing has worked. I think it's likely related to the new modem, but I could be wrong. I'm not good with advanced settings, but I'd really appreciate if someone can help me.

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Re: can't download

- If another PC/laptop can download with your modem, it's not the modem, but most likely your device.
- If your laptop/PC doesn't work elsewhere either, it's surely your device.
Those are easy tests.

Then it's time to reset or refresh Windows.

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I am using a desktop, my main computer which is wired appears to not have these issues. I'm concerned it's some wireless setting within the router that I need to change along with the new modem. I still could be wrong though, but I really don't understand how I can have internet access but things won't download in 2 browsers or connect to finish installs after I use IE.

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I just hooked up my old modem and didn't change anything and the downloads seem to work again. What's going on here?

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New Modem settings

Sounds like you need to make a note of your settings on the WD modem and then go through the settings on the new modem to ensure they match. The interface will be different for sure, so you will need the full setup manual for the new modem, not just the "Quick Start" leaflet.

If the new modem supports IPV6 and the old one was IPV4 only, assuming the new one also supports IPV4, try disabling IPV6. If that works, then there is a setting in IPV6 you need to change.

I feel your pain, Telstra here just upgraded my old modem to a T-Gateway Max and I'm still searching the menu tree for some of the setting I want to make!

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