...Symantec Corp. sued software rival Microsoft Corp. on Thursday, accusing it of misappropriating trade secrets to develop its own competing features and products, including the next version of Windows.

The lawsuit filed in federal court in Seattle charges the world's biggest software maker with misappropriating intellectual property and breach of contract related to a licensing deal with Veritas, which Symantec acquired last year.

It also seeks an injunction that would block the further development, sale or distribution of Vista...