[solved] Weather Forecast - Yahoo service retired

Where your toolbar with Weather Monitor is located. Is this taskbar of standalone toolbar. When TLB is integrated into the taskbar you have to allow internet access for explorer.exe

Do you have any other firewall software? Maybe antivirus software, some of them have integrated firewalls especially for Windows Explorer.

Also try to open this url using browser:
https://weather-ydn-yql.media.yahoo.com/forecastrss

Brilliant - Got it! - Many thanks, Yuri.

I just had a look at relevant rules in Windows Firewall Control, and saw that explorer.exe is allowed, but there was a 'block' rule for 'NVTSYSH - Explorer.exe'. When I examined that rule I found that it's one of a number of system-hardening rules added by OSArmor, which I'm trialling at the moment. I tried disabling that one, and, sure enough, Weather Forecast suddenly works again. So, I'll have to work out how I can make an exclusion to allow Weather Forecast to work, while making minimal impact on the overall system hardening. - But at least that's now just something for me to work out, and no worry for anyone else.