Hewlett-Packard Co. said that a British company it bought for $9.7 billion last year lied about its finances, resulting in a massive write-down of the value of the business. CEO Meg Whitman avoided calling it a fraud, but said Tuesday that there were “serious accounting improprieties, disclosure failures and outright misrepresentations at Autonomy Corporation PLC.” HP is taking an $8.8 billion charge in its latest quarter largely to align the accounting value of Autonomy with its real value. The revelation is another blow for HP, which is struggling to reinvent itself as PC and printer sales shrink. Its shares hit...