Following investigations by the U.S. government, the U.K. is also looking into alleged fraudulent accounting by Autonomy in the lead up of its sale to HP.
In its new annual report, Hewlett-Packard says the Department of Justice has opened an inquiry into the $11 billion 2011 deal, now allegedly marred by accounting impropriety.
The company says it discovered evidence of bookkeeping manipulation at Autonomy prior to HP's multi-billion dollar acquisition of the software company.
A suit, seeking class action status, claims HP knew its statements about its acquisition were misleading.
For its fourth quarter, Hewlett-Packard records a charge of $8.8 billion in its software unit, which had "serious accounting improprieties...and outright misrepresentations" when HP bought it.
All 11 board nominees were elected at annual shareholders meeting, despite controversy over Hewlett-Packard's botched $11.1 billion software acquisition.
HP officially wins control of Autonomy. The deal has been criticized by analysts for being too pricey.
After HP announced an investigation into its purchase of the software company, Autonomy founder says, "We can confirm that we have as yet had no contact from any regulatory authority."
In her first call with press and analysts, new HP CEO Meg Whitman reiterates that "HP matters" and indicates that the grand plan for the company remains the same.
Hewlett-Packard knew about Autonomy's accounting issues long before it accused the firm of fraud, a new report says.