IE Browser bug
We are recommending that users stop using IE due to a vulnerability which makes it possible for hackers to take control of a user’s computer after it has been infected with malicious code.
Microsoft does recommend some work-arounds: https://technet.microsoft.com/en-US/library/security/2963983 or we can use another browser until this is resolved. A fix is expected by May 13.
Also, the attack will not work without Adobe Flash. Disabling the Flash plugin within IE will prevent the exploit from functioning.
Other references:
http://www.cnet.com/news/stop-using-ie-until-bug-is-fixed-says-us/