Scheme dependence of the next-to-next-to-leading QCD corrections toΓtot(H0→hadrons)and the spurious QCD infrared fixed point

The analytical result of reevaluation of the massless three-loop next-to-next-to-leading-order QCD corrections to ${\Gamma }_{\mathrm{tot}}(H^0\to \mathrm{hadrons})$ is presented. The analysis of the scheme-dependence property is considered. The value of the scheme-invariant quantity ${\rho }_2$ is determined. It turns out to be negative and large. Therefore, the truncated effective $\beta$ function has an infrared zero. It is argued that this "fixed point" is a spurious one. The problem of getting reliable information from the perturbative series with large coefficients is discussed.