ndows installation files to hard disk in advance). If even safe mode is unavailable to enter, then boot to DOS through boot disc or floppy disk. Under DOS, first kill viruses and check whether the files on drive C are integrated with Dir, when necessary, do SysC: with system floppy disk, recovering relevant basic system files. If there’s no file found on drive C, then you’d only have to reinstall system completely.
 Drive is missing
Symptom: when start up, just display 16 colors, when playing audio files, it shows that “xxx” device is occupied.
Symptom analysis:  eliminating virus reason, this failure mostly happens on old machine used for many months, or the user recently moved the inside parts, (such as display card and PCI card), then it may cause bad contact between hardware, which makes system hardly to inspect relevant hardware completely.
 Solution: reinstall the driver for the display card, and check whether the relevant accessories contact completely with the motherboard: one is to ensure the cleanness on the golden fingers of display card and sound card; second is to be proper when insert to relevant slots, just aim at the position and insert vertically, and then connect the cable of the matched sound box and monitor. When necessary, change the slot position of the PCI card, avoiding resource confliction with display card.
 Black screen when starting up
Symptom: black screen occurs when start up, no display, probably there’s warning sound.
Symptom analysis: there&