Windows 7 users are reporting that the notorious update KB3035583 has been re-enabled on their computer without prior notice, so Windows 10 files could be again downloaded to prepare the upgrade to the new operating system.

KB3035583 was first released in the summer of 2015 to prepare the transition of computers running Windows 7 and Windows 8.1 to the new Windows 10. The update brought the infamous Get Windows 10 app that checked systems for compatibility issues with the new OS and downloaded all the prerequisites to perform quick deployment with minimum user interaction.

Those who didn’t want to perform the upgrade to Windows 10 could remove and hide the update or turn to third-party applications that blocked the new operating system completely in order to avoid any accidental install (accidents like this did happen and Microsoft apologized, promising to always offer full control to users and let them decide whether to install Windows 10 or not).

And now, it turns out that users who previously hid this update are seeing it re-enabled in Windows update, according to a discussion on reddit and other online forums.

Not happening on Windows 8.1, though

It appears that KB3035583 not only shows up in Windows Update but is also checked as a “Recommended Update,” so it installs together with all the other updates that you might receive.

“Looks like Microsoft has un-hidden and re-enabled KB3035583 last night. Make sure those of you who want to stay on Windows 7 have your updates set to not automatically install. I use GWX Control Panel - have put the registry settings in, but this keeps coming back. Check your Windows Updates today and hide it again,” one user explains.

At this point, it’s not yet clear if this is widespread behavior because some users claim they’re not seeing the update coming back in Windows 7, but if you do, make sure you hide it again in case you don’t want to upgrade to Windows 10.

But with the free upgrade window for Windows 10 ending in just a couple of months, you better reconsider your options because you are running out of time to install the new OS free of charge.