Ever since Microsoft launched Windows 10, the company has come under fire for its aggressive update policies. In the weeks following launch, Windows 7 users were greeted with a giant “Reserve your upgrade today!” banner, every time they launched IE11 (if set to the default home page). At least one user had a system surprise-install the operating system, despite not being told to do so. And now, in an apparent repeat of what we thought was an odd corner case, Microsoft made an error in Windows Update that’s forcing people to upgrade to Windows 10, whether they wish to do so or not.

The problem, according to Microsoft, is that the Windows 10 Update was switched from “Optional” to “Mandatory” and automatically distributed to users who had “Download and install updates automatically” enabled.