The firm's statistics peg Windows 8 on a 5.1 percent share of the OS market, nudging it ahead of the much-maligned Windows Vista on 4.6 percent.
This makes Windows 8 the third most popular version of Windows currently in use, behind Windows 7 and Windows XP.
OS wars
Windows 8 gained 0.83 percentage points in June, putting it comfortably ahead of the two most recent versions of OS X.
In all, Apple's OS X currently accounts for almost 7.2 percent of the market, meaning Windows 8 will likely surpass the platform within the next couple of months.
The good news for Microsoft comes just after the firm released a public preview of Windows 8.1 the first major update for the platform since launch, sporting a redesigned app store designed to aid game discovery.
The new Windows Store scrolls through promoted apps
The last official statistics released by Microsoft back in May suggested Windows 8 was currently moving 10 million copies a month, with its total having topped 100 million.
Windows 8.1 is expected to launch in full this autumn.
[source: Net Market Share]
