Apparently the main mechanism of infection for the recent spate of ransomare infections is via outdated Java installations so I've been following that advice and removing it from the PCs of vulnerable users.
It's also worth pointing out that Adobe Flash and Adobe Reader exploits are still very common so it's important to make sure those two are always kept up-to-date.
For those that need to have Java installed because a certain website requires it then the best advice is to disable it in all browsers except for one and only use that browser for visiting those sites that require Java.
Thanks for this info. I checked my Firefox 18.1 plugins and found that Firefox had already blocked my use of Java. I've now clicked on Disable plugin and will follow through on the advice in threads and links.
C:\Documents and Settings\xxx xxxxx\Local Settings\Application Data\Sun\Java\Deployment\cache\6.0\35\57c07e23-45918129 » ZIP » toe.class - a variant of Java/Exploit.CVE-2012-5076.L trojan - was a part of the deleted object