- 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.
I spent hours trying to solve to no avail. If I try to download a file from dowload.com 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.