It has been a scandalous month for international businesses. But while the coffee-drinking public in the UK has been boycotting Starbucks, Hewlett-Packard has been embroiled in an ongoing spat with a recently acquired software company.

HP’s acquisition of Autonomy caused an internal rift between the companies two CEOs and HP attempting to write off three-quarters of Autonomy’s value due to alleged misrepresentation of the latter’s accounts. Now, the U.S. Department of Justice is investigating the matter.

The difficulty for the hardware giant lies with its inability to uncover the issues within the Autonomy accounts prior to its acquisition of the company.

However, at the moment HP is cooperating with the DOJ investigation alongside the UK’s Serious Fraud Office and the American Securities and Exchange Commission in the attempt to prove Autonomy’s falsification of its accounting. HP has declined to publicly comment beyond its reports to these agencies.

HP’s market value on the NYSE has dropped by 45% this year.