anyone please help me!.. im trying to downgrade my acer aspire m5640 to windows xp, im using windows vista.. i slipstream all the drivers like sata and i follow the instruction in sticky at forums, im using nvidia drivers.. after i boot my windows xp, after the drivers load the blue screen of death appear! i cant install windows xp please help me!. my desktop is acer aspire m5640! -sorry for my english! hehehe