Security software maker McAfee said fourth-quarter profit slipped 9% from the fourth quarter 2005 as costs rose.

The company said the results are preliminary due to pending restatements. McAfee is one of roughly 200 companies to launch a probe of stock option grants or are under federal scrutiny for possibly backdating stock option grants. It previously said it would need to record additional noncash charges of $100 million to $150 million for historical stock option grants that had not been properly accounted for.