"We expect Microsoft to enter the security markets certainly this year," Thompson said. "As such we plan to increase our investments in consumer marketing and channel-related programs ahead of their market entry to fortify our leadership position."
Speaking on the Cupertino, Calif., security vendor's earnings call Tuesday, Thompson added that Symantec plans to "extend our leadership in key enterprise segments by investing in new technologies."
Symantec Tuesday reported earnings of $90.7 million, or 8 cents per share, in its third quarter, compared to $163.6 million, or 22 cents per share, in the same quarter a year ago.
Symantec's results included a $166 million charge related to the acquisition of Veritas Software. Before the charge, Symantec posted earnings of 26 cents per share, beating analysts estimates of 25 cents.
Revenue for the security company grew to $1.15 billion for the quarter, up from $695.2 million in the year-ago quarter.
"Our December quarter was driven by a record number of large transactions and robust performance in backup, e-mail archiving and high availability solutions,” Thompson said.
For the current quarter, the company projected earnings of 25 cents per share on revenue between $1.25 billion and $1.28 billion.