Mine went really slow because of corrupt sectors on the hardrive. To check open 'my computer' and 'right click' on the C:/ drive (or what ever drive windows installed on) and select propeties. On the 'tools' tab select error check. Next dont let it fix file errors (dont know why but my computer didnt like that selection, but let it attemp to repair bad sectors. Let it run and see if ur hardrive has corrupt sectors.