NEW YORK (TheStreet) -- Microsoft (MSFT) - Get Report said its new Windows 10 operating system is running on more than 14 million devices in just a couple days after it was released via a free download.

In a blog post, Microsoft said it has seen unprecedented demand for Windows 10, with positive reviews and customer feedback. The company said it is rolling out the operating system in phases, so it has not yet been delivered to everyone who requested it.

Daniel Ives, managing director and analyst at FBR Capital Markets, said he views 14 million downloads as a solid number out of the gates and a positive indicator for future success on both the consumer and enterprise fronts.

He added, "Feedback has been healthy so far although it's a long road ahead to get to one billion devices. While a lofty goal, we believe Microsoft has finally figured out the right formula with Windows 10 as the features around this flagship product, coupled by free downloads, has been the right one-two punch to drive adoption." Ives said subscriptions and cloud remain the key to Windows 10 unlocking future revenue opportunities.

The Windows 10 free upgrade landed in 190 countries on Tuesday. Microsoft said on its blog, "When we first unveiled Windows 10 in September, we outlined our plans for a new era of Windows. We wanted to create a Windows that empowered people and organizations to do great things. Our vision was one platform, one store, and one experience that extends across the broadest range of devices from the smallest screens to the largest screens to no screens at all."

Microsoft called Windows 10 "the most secure Windows ever," with enhanced Windows Defender and Smart Screen to protect users from viruses, malware and phishing. It also called the operating system its "best enterprise version of Windows ever," designed with feedback from IT professionals.

TheStreet Ratings team rates MICROSOFT CORP as a Buy with a ratings score of B-. TheStreet Ratings Team has this to say about their recommendation:

"We rate MICROSOFT CORP (MSFT) a BUY. This is driven by multiple strengths, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. The company's strengths can be seen in multiple areas, such as its reasonable valuation levels, expanding profit margins, increase in stock price during the past year, largely solid financial position with reasonable debt levels by most measures and notable return on equity. We feel its strengths outweigh the fact that the company has had sub par growth in net income."

You can view the full analysis from the report here: MSFT Ratings Report