Magnet links not working

[Killingjoker]

hi everyone.

i run vuze on windows 7 , for no apparent reason, when I click on a magnet link in say kickass, like I have done for years, i get a "web page cannot be displayed" message , stating that "the files on this page require a program I do not have installed", 

I have uninstalled and reinstalled vuze  several times, done a malware search etc, but no help.

can anyone help me please?