| Reinstall windows 
 Asipre One , i think is come with windows .
 Normally ,acer notebook come with windows have recover function (Alt + F10).
 The means no have any windows cd , only have recover function .
 
 2nd choice ,is reinstall windows use ori disc ,and download drive from Acer website.
 
 Do partitions
 
 1.windows 7 can direct do it ( right click computer--manage-storage--disk managemant --right click C partition ---shrink volume)
 
 2.windows Xp need use software jor.
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