Fix Win XP recognition.
Fix Win XP recognition.

qbit/psutil,Q-Leap-Networks/psutil,0-wiz-0/psutil,mindw/psutil,landryb/psutil,msarahan/psutil,tomprince/psutil,qbit/psutil,tomprince/psutil,jamesblunt/psutil,qbit/psutil,cloudbase/psutil,mrjefftang/psutil,landryb/psutil,cloudbase/psutil,landryb/psutil,tomprince/psutil,jorik041/psutil,msarahan/psutil,jamesblunt/psutil,landryb/psutil,giampaolo/psutil,mrjefftang/psutil,0-wiz-0/psutil,msarahan/psutil,Q-Leap-Networks/psutil,tomprince/psutil,mindw/psutil,jorik041/psutil,packages/psutil,packages/psutil,giampaolo/psutil,mindw/psutil,jamesblunt/psutil,tomprince/psutil,landryb/psutil,jorik041/psutil,cloudbase/psutil,mindw/psutil,packages/psutil,mrjefftang/psutil,mindw/psutil