Computer users are being advised by security experts to disable Oracle's widely used Java software after a security flaw was discovered in the past day that they say hackers are exploiting to attack computers.

"Java is a mess. It's not secure," said Jaime Blasco, Labs Manager with AlienVault Labs. "You have to disable it."

Security flaw ... experts are advising PC users to disable Oracle's Java software.

Java, which is installed on hundreds of millions of PCs around the globe, is a computer language that enables programmers to write software using just one set of code that will run on virtually any type of computer.