While some feel it may not be a super hit, despite a free update for those with versions above Wondows 7, others say it will prove more of use on devices other than personal computers, like smart phones, tablets and other hand-helds. This apart, its acceptability at the enterprise level is also in doubt. Nevertheless, Windows 10 will also help those with pirated versions of Microsoft operating systems to migrate to an authentic version, making room for a wide range of applications to choose from.

"At the enterprise level, adoption will vary. Early adopters of Windows 7 may migrate to Windows 10 if they have some compelling business reasons. Cost is not the only concern for organizations. It is also about security, compatibility and manageability," said Vishal Tripathi, research director at Gartner India.

"Organisations use legacy- and custom-based applications than regular plug-and-play software. A compatibility test is needed. That will require time and effort. Those that recently migrated to Windows 7 will not move away too quickly, while others will wait and watch," Tripathi said.

According to Prasanto K. Roy, a noted technology writer and chief editor of Trivone, a media and digital services company, Windows is an overhaul of the previous version that had flopped. But getting enterprises to upgrade to it will be near-impossible.

"This apart, PC sales are also weak and Windows users don't upgrade the way Mac OS users (or iOS users) do when a new OS is launched. This is true worldwide, and even more so in India," Roy said.

"Overall, I think Windows 10 is great. But it isn't going to save Microsoft or do much for its desktop revenues," he said.

Another analyst, Kiran Kumar of IDC, said India has an installed base of 55-60 million personal computers, out of which some 55 percent are with individual consumers while the remaining are with businesses and institutions.

"An increase of even 1.5-2 percent in PC volumes will mean around 10 million additional volumes. Consumers will be eager to go for the new Microsoft launch, as Windows 10 is a free upgrade. These will be targets for vendors like Microsoft," Kumar said.

But it is over the enterprises market that analysts seem to converge with the forecasts.

"The enterprise market remains a tough nut to crack for Windows. This is true globally and more so in India, because enterprises are reluctant to upgrade," said Roy, adding, as stability is the main criteria, may will hold on to ageing Windows 7 or even the obsolete, 13-year-old Windows XP.