If you are using IE 10 or 11 FireEye says that if you turn on Enhanced Protected Mode in IE it breaks the exploit in our tests. EPM was introduced in IE10. Doing this should stop this problem.

News for Homeland Security issue a warning to stop using IE ...

ABC News
US, UK advise avoiding Internet Explorer until bug fixed
Reuters ‎- 1 hour ago

http://www.reuters.com/article/2014/...A3Q0PB20140428

The Department of Homeland Security's U.S. Computer Emergency ... on Monday that the vulnerability in versions 6 to 11 of Internet Explorer ... to use another browser such as Google Inc's Chrome or Mozilla's Firefox. DELAYED UPGRADES. Security experts have long been warning Windows XP users to ...