Ben Fathi, one of Microsoft’s senior Windows executives is set to quit the company only day’s after the launch of Windos 7.

He is set to join Cisco Systems, who is struggling to get traction in the consumer market with their FLIP Camera, storage and music systems and are believed to be working on new OS software for devices and content servers.

According to Seattle based Tech Flash, Fathi was working most recently in the Windows Core Operating System Division, as corporate vice president of development, reporting to senior vice president Jon DeVaan. In that role, Fathi oversaw key development areas for Windows and Windows Server, including the kernel and hypervisor.

Microsoft who are now planning Windows 8 has declined to comment.

 but the timing would be right: It’s not uncommon for the Windows division to make internal adjustments after a major release. With the debut of Windows 7 last week, Fathi’s move might be the start of a series of shifts by executives and engineers as the division gears up for the development of Windows 8.

There is also speculation that Cisco is working on a new OS designed for networking, internet and portable devices. The OS will deliver video content at high speed, handshaking with carriers who have Cisco networking hardware and devices running Cisco software.

The Company has refused to comment.