First at all for better performace the notebook must be supplied through adapter from power line not from the battery. Second, you should install AMD Power Now Driver for XP (Vista has this driver as default). You can download this Driver from official MSI web (
http://global.msi.com.tw) for MSI EX610X notebook (like I understand GX710 and EX610 have the same processors) or go at AMD web and find this driver suitable for your processor. At the end open control panel, than power option and set power schemes on Home/Office Desk!