  Windows in Euclidean time have become a standard tool for comparing lattice
QCD and data-driven computations of the hadronic vacuum polarization (HVP)
contribution to the muon $g-2$. Here we review our results, obtained using
isospin-rotated $\tau^-\to\pi^-\pi^0\nu_\tau$ data instead of
$e^+e^-\to\pi^+\pi^-$ measurements, and compare them to other approaches.
Consistency of the tau-based and lattice results hints to underestimated
uncertainties in the $e^+e^-$ data. If that is the case, the theory prediction
of the muon $g-2$ would only lie at $\sim 2\sigma$ from its measured value.
