For Windows 10, sometimes the proxy gets enabled by crappy software. Go to Control Panel > Internet Options > Connections tab > LAN settings.
Make sure "Automatically detect settings" is checked and proxy is unchecked.
If it’s still weird, try disabling VPNs or "metered connection" in network settings.
Make sure "Automatically detect settings" is checked and proxy is unchecked.
If it’s still weird, try disabling VPNs or "metered connection" in network settings.