Microsoft Corp is denying rumors that it is to set to sell off its Microsoft Network online service. Internet publication TheStreet .com claimed last week that Microsoft was looking to unload a majority stake in the loss-making venture, likely to lose $200m on revenues of $500m in fiscal 1998. Microsoft has recently begun licensing content to other access providers for the first time, including @Home Networks Inc. Additionally, Microsoft was set to announce a software upgrade for Microsoft Network users yesterday, MSN 2.5, which is said to simplify electronic mail facilities and speed up installation times.