Dell Inc said on Thursday it would restate four years of financial results, reducing net income for the period by as much as $150 million and revenue by 1 percent or less per year, after the former leading PC maker completed a lengthy audit of its accounting.

The investigation's conclusion marks a turning point in a review of the company's finances that earlier had weighed on Dell's stock and had raised questions about the reliability of its financial reporting.

It comes as Dell, the world's second-largest personal computer manufacturer after Hewlett-Packard Co , is revamping its consumer unit and cutting 10 percent of the work force to focus on its fastest-growing and most-profitable businesses.