Analysis of common problems and solutions for CD-ROM under Windows system

If the optical drive is no longer important, then I don't agree. Although many high-speed developments in the network can be realized without CD-ROM, the CD-ROM still plays a role. To be a role, so the problem with the CD-ROM is still to be solved. It has become a must-have device for computers. As a machine, it is inevitable that there is such a fault. Sometimes, when the machine is installed, the drive letter of the CD-ROM drive is not available. Install the system, change the data cable, check the CMOS settings. Finally, I took the time to get it back.

Running a CD-ROM drive under Windows can bring a lot of convenience to our work. This article will tell you some of the reasons and practical tips for using the CD-ROM drive under Windows for your reference.

Optical drive failure reason

Software reason

1. IDE driver installation error or conflict with a driver

If we are installing WIN98 or 95 does not install the IDE driver correctly, or when you open the device manager after installation to view the "hard disk controller" when it is found that there is a yellow exclamation mark, then the drive letter of the drive may not be found.

Under normal circumstances, when we enter safe mode, the drive letter of the CD-ROM will not be available. If we want to use the CD-ROM drive in safe mode, we can load the CD-ROM drive in the Autoexec.BAT and Config.sys files, so that we can use the CD-ROM drive in safe mode after restarting the computer.

2, set the number of LASTDRIVE in the CONFIG file is too small

If we are in CONFIG. The number of “LASTDRIVE=?” set in the SYS file is too small, less than the actual number of drives, even if we installed the CD-ROM drive, but in the "my computer", I can not see the shadow of the CD-ROM drive. Just remove the setting or set it to “LASTDRIVE=Z”

3, DMA settings are not appropriate

If the CD-ROM only supports the PIO4 standard, does not support the DMA/33 standard, and we force the CD-ROM to use the standard (in the "My Computer" attribute In the "Device Manager" in the CD-ROM drive "CDROM" attribute "set" & ldquo; option of the "DMA" before hitting "V” number". At this time, the optical drive may be lost sometimes, and sometimes the computer may not start normally. At this point we can enter safe mode, remove the DMA settings in the CDROM properties. What kind of data transfer mode is supported by the hard disk or optical drive we use, we can see it in the basic configuration table of the second screen during computer startup.

4, the optical drive is maliciously blocked in the registry

If someone in the "HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVrsionPolicesxplorer", the binary value of "NoDrivers" is the value of the CD-ROM drive. If there is no such item under normal circumstances, you can also change the value to “00<00>

00 00 00“ (01 00 00 00 is A, 04 00 00 00 is C, FF FF FF

FF is to hide all drives).

Note that some viruses now specifically change the registry, so that the drive letter is lost, which makes us format the hard disk, and install the system. Some viruses will not lose the drive letter, but will prohibit the CD-ROM from reading the disk. What kind of disc can't be read, but it can be booted from the CD.

5, the driver of the CD-ROM drive is installed correctly

If the driver of the CD-ROM drive is not installed by its own driver, the CD-ROM drive will also be lost. This situation usually occurs in order to improve the performance of the optical drive, artificially add optical drive acceleration programs or other programs found from the network or CD. Usually, the drivers for the optical drive are included in both WIN98 and 95, and no additional addition is required. At this time, you can enter the security mode to delete the "CDROM" option in the "Device Manager", and then restart the computer, let the system discover the new hardware and reinstall the driver of the CD-ROM drive.