Shkatov and Kohlenberg’s talk, entitled “We have you by the gadgets”, threatens to expose various attack vectors against gadgets, how malicious gadgets can be created, and the flaws they have found in published gadgets.
The source url for the weather info may have changed.
Clearly Microsoft is worried about the security researchers’ findings, and has issued a “Fix It Tool” which will protect Windows 7 and Vista users by entirely disabling the Windows Sidebar and Gadgets functionality. Microsoft hasn’t issued a security patch to fix the vulnerability.
They’re suggesting you completely nuke your Windows Sidebar and Gadgets.
Consequently the gadget "Cannot connect to service".
The same thing happened about 3-4 months ago with the MS Currency Gadget.