The Home Depot says it has eliminated malware from its U.S. and Canadian networks that affected 56 million unique payment cards between April and September.

The Atlanta-based home improvement retailer said Thursday it has also completed a "major" payment security project that provides enhanced encryption of customers' payment data in the company's U.S. stores.

Home Depot also is confirming its sales-growth estimates for the fiscal year and expects to earn $4.54 per share in fiscal 2014, up 2 cents from its prior guidance.