Four of Microsoft’s offices in China were raided yesterday as part of an anti-monopoly investigation. Chinas State Administration for Industry and Commerce (SAIC) has revealed that around 100 officials made unannounced visits to Microsoft’s offices in China, seeking information on Microsoft’s security features and the way it bundles software. Microsoft was quick to issue a statement yesterday when news of the raids broke, noting that the software maker would actively cooperate with the government. China’s investigation appears to have been prompted by complaints from rival companies over the past year about compatibility issues with some of Microsoft’s Windows and Office software.