Ars Technica reported on Microsoft downloading Windows 10 to PCs, even if you don’t “reserve” a copy.

According to The Inquirer, the situation was first reported by an anonymous reader who claimed to have discovered a hidden directory called $Windows.~BT on his computer, despite not opting in for a free upgrade to Windows 10. The directory weighed in at “3.5GB to 6GB,” according to the reader.

“I thought Microsoft [said] this ‘upgrade’ was optional. If so, why is it being pushed out to so many computers where it wasn’t reserved, and why does it try to install over and over again?” he told the outlet.

Aggressive.