Snappy and responsive! These words were directly from Paul Allen, one of Microsoft's co-founders, and which mostly described his experience while immersing himself in the new Windows 8 environment.

Like his former colleague, Bill Gates, Mr Allen said in a recent blog post that the reengineered Microsoft operating system, which deploys Oct 26 on traditional PCs, tablet computers and smartphones, was both "impressive and exciting."

Users, however, should anticipate some bits of adjustments, which is especially true to the PC-trained generation because the new Windows 8 interface has been designed to work on conventional desktops or notebooks and tablets.

Mr Allen wrote in his blog that Microsoft's new creation was authored to accommodate two versions of applications - one for PCs and one for tablets - which users can pull up simultaneously.

Such Windows feature can be confusing, the tech icon warned, suggesting too that there should be an option in the OS that allows users to configure it on the manner they utilise it. If the platform is on a PC then it should act like one and if it's on a mobile device, its behaviour should be confined within that brick, Mr Allen said.

"I would almost always prefer for Windows to leave me in whichever mode I was already in," the former Microsoft executive was reported by CNET as saying on Tuesday.

Windows 8 automatically switches from one mode to another, a function that in his view would leave the average users 'puzzled', he added.

Yet his gripes on the tablet mode were generally eclipsed by what he called as its "bold and innovative," features, which in the end should provide consumers an elegant mobile computing experience via the Windows 8, said Mr Allen on his analysis.

"Windows 8 offers the best of legacy Windows features with an eye toward a very promising future," he further predicted.

Yet for that to happen, Windows newbie should be forewarned that transition to the new OS would be hardly smooth.

"Windows 8 does certainly require a brief adjustment period before users become familiar and comfortable with the new bimodal operating system," The Register quoted Mr Allen as saying in his blog.

Users that were previously interacting heavily with their computers through normal input devices like keyboard and mouse would likely feel some awkwardness in finally joining the touch-centric crowd of mobile computing.

But then again he conceded: "Touch seems a natural progression in the evolution of operating systems."