Microsoft continues to be forced to quietly edit a misleading post that seemed to suggest that anyone might get their mitts on Windows 10 for free ?§C when they first installed an exam version of Redmond's upcoming operating system for PCs.

The one caveat appeared to be that folk had to use a microsoft visual studio ultimate 2013 Account (MSA) that's linked to the firm's Windows Insider program.Microsoft said that a freebie upgrade would then be employed for anyone who has installed its latest Windows 10 preview (build 10130). And that promise seemed to stand even for users who did not have Windows 7 or Windows 8.1 previously placed on their PCs.

Windows boss Gabe Aul said in a blog post on Friday:

Windows Insiders running the buy microsoft office 2013 professional plus Insider Preview (Home and Pro editions) using registered MSA attached to their PC will receive the final release build of Windows 10 starting on 29 July .Providing you are running an Insider Preview build and linked with the MSA you used to register, you are going to receive the Windows 10 final release build and remain activated.Once you have successfully installed this build and activated, additionally, you will be able to clean install with that PC from final media if you need to start over fresh.However, that apparent slip from the tongue (use of the word "activated") has now been taken out of the post.

And Aul has since added this clarification: "It's important to note that only people running Genuine Windows 7 or Windows 8.1 can upgrade to Windows 10 within the free upgrade offer."

Meanwhile, Windows fans should take note in the following:

With no your office professional plus 2013 Account (MSA) linked to your PC, beginning in the next build you'll begin to see notifications suggesting that you do so.You'll need to connect the MSA that you just registered for the Windows Insider Program with (and accepted the ???Microsoft Windows Insider Program Agreement??à) so that you can continue receiving new Windows 10 Insider Preview builds (both Fast and Slow rings) from Windows Update.If you already have your MSA associated with your account on your computer, then you're all set.

We're introducing new infrastructure in microsoft office 2010 professional to aid us deliver new builds more effectively to Windows Insiders, and be sure that we're flighting builds to folks who suffer from registered and signed up to the program.In other words, users running another preview build from the OS will be nagged in order to connect their PC for the MSA they used to register for the Windows Insider program.Meaning, once that build lands, testers (who haven't done this already) can have no choice but to join for a Microsoft Account whenever they want to continue fiddling with tech previews of the OS before its planned release on 29 July.