Demand for Windows 8 may be sluggish, but Dell still believes it's the best operating system for business tablets and plans to roll out more Windows 8-based products later this year, according to a senior executive at the computer maker. "Our Windows tablets are more secure and easier to manage than Android-based products and iOS-based products [because Windows is] on our tablets," said Jeff Clarke, vice chairman and president of global operations at Dell. "And we are not going to change that."