W7 到期未啟動就會被要求驗証 (要啟動)
想裝回 XP->Backup data->BIOS>SATA=IDE mode (XP 用)->1st Boot device=DVD-ROM 型號->放 XP DVD 入 DVD-ROM->Save & exit
(部份 BIOS 會顯示 "Press any key to boot from CD or DVD" 要按一下 Keyboard 才可啟動 Windows DVD)
XP install->Hard disk delete W7 partition->建立新 Partition->Format->Install XP