Local branch representatives confirmed his presence here but did not reveal the date or the purpose of the visit.
Gates, the richest man in the world according to Forbes Magazine, attended the economic forum in Davos, Switzerland between January 24 and 28.
This will be the billionaire's first time in Romania. In October 2004 Steve Ballmer, the general manager of Microsoft, came to Romania for the signing of a memorandum with the government.
Media sources say Gates is coming to attend the launch of Windows Vista or another company product. Other sources say that he is coming for the official opening of Microsoft's technical support center in Bucharest.
Media reports said that the local branch of the company is preparing an outdoor advertising campaign for Windows Vista which will be launched on Gates' arrival day and will mark his road from the airport to the city.
The local branch of Microsoft was opened in 1996.