Microsoft told the WSJ that it's currently cooperating with the Justice Department and the SEC and has also done its own internal investigations. David Howard, the company's deputy general counsel, said in a statement to the WSJ that the company has already fired four employees related to the Hungary probe, as well as the country manager, Istvan Papp. "We're committed to ethical business practices and won't compromise these standards,' said Howard in the statement.

This isn't the first time that Microsoft has been under such scrutiny. Back in 2013, Microsoft was under investigation by U.S. regulators over similar claims in China, Romania and Italy. The Wall Street Journal points out that partners in Russia and Pakistan may have bribed government buyers as well. It's unclear if the U.S. is continuing to investigate Microsoft's activity in these other countries at this time.