April 28 (Reuters) - Symantec Corp, best known for its Norton antivirus software, cut its fourth-quarter profit and revenue forecast below analysts' estimates, and said its Chief Executive Michael Brown will step down.

The company cut its revenue forecast to $873 million from a range of $885 million-$915 million, and lowered its adjusted profit to 22 cents per share from 24-27 cents per share.

Analysts on average were expecting a profit of 25 cents per share on revenue of $901.2 million, according to Thomson Reuters I/B/E/S.

Brown will continue as CEO until a successor has been appointed, the company said.

(Reporting by Supantha Mukherjee in Bengaluru; Editing by Shounak Dasgupta) ((supantha.mukherjee@thomsonreuters.com; within U.S.+1 646 223 8780, outside U.S. +91 80 6749 6101; Reuters Messaging: supantha.mukherjee.thomsonreuters.com@reuters.net))