Getting frequent HTTP Error 408 - How to fix request timeout issues? or HTTP Error 408 popping up – I

This might sound dumb, but... restart your modem AND your computer.

I know you said you tried, but sometimes a full power cycle (unplug for 30 secs) fixes weird timeout issues.

If not, check if your DNS is wonky—try Google’s (8.8.8.8) as a test.