Try to boot F8 into safe mode and uninstall incompatible hardware device drivers (i.e. open device manager >; Right-click on each device) > properties > drivers > digital signature program >: there is no driver for "Microsoft Windows Hardware Compatible Publisher" in >; It is a driver that has not been digitally signed by Microsoft. If there is such a driver in the system, it will cause various problems. ) After turning on the computer to automatically identify hardware devices, reinstall the driver (WHQL) that you downloaded and has passed the Microsoft digital signature authentication, and then restart the computer again to see if there is any improvement. (xyz58 19 idea space-time)

Friendly reminder: as long as the driver works, don't blindly pursue new ones. Otherwise, installing incompatible drivers will lead to unstable system operation, which often leads to blue screen of death phenomenon. (xyz58 19 Idea Space) It is recommended that you download the driver with Microsoft WHQL certification from the manufacturer of your specific hardware device or the driver's home. (xyz58 19 idea space-time)

Appendix Microsoft explained: The driver has not been digitally signed, which means that the driver has not passed the test of Microsoft's Windows Hardware Quality Laboratory (WHQL). Installing a driver without digital signature will lead to unstable operation of the operating system and even blue screen of death phenomenon. You can get the WHQL-signed driver from the hardware manufacturer. (xyz58 19 idea space-time)

If you can't find it, just download a driver wizard or driver life, and it will automatically help you find the corresponding driver in the networked state. (Note: You must download and install (WHQL) certified drivers. ) (xyz58 19_ idea space-time)

What if there is no sound in the computer (notebook)?

The reason why the computer has no sound:

1. The computer speaker cable is not connected properly, the speaker is not turned on, the speaker volume is adjusted to the minimum position or the speaker is not powered on, or the audio I/O interface behind the sound card is plugged in backwards. This causes the computer to have no sound.

2. In the volume control in the lower right corner of the computer screen, control the volume to a minimum or set it to mute.

There is a Trojan virus in the computer, which will destroy the files related to audio processing, especially the system components related to Dsound.

4. The program related to the sound card driver is damaged or the driver is not installed correctly, and an unsupported device driver is installed. (xyz58 19 idea space-time)

The solution of computer silence;

First of all, you should check whether the speaker switch, signal line and volume control are normal. Then, check whether the related settings of sound multimedia in the control panel are normal. If the driver fails, these options will be grayed out and unchecked.

If other sounds are normal, only the sound is silent. Click the "Mute" button in the sound settings of the control panel to make it pop up, cancel the mute state and increase the volume. (xyz58 19 idea space-time)

Use Kingsoft Internet Security or Kingsoft Guardian to quickly kill and check the computer for virus damage. Generally, we don't need to completely kill the hard disk, just use Quick Kill, scan for 3-5 minutes, and follow the prompts to remove the virus.

If all the above methods fail, you should check the control panel and device manager to see if there is a yellow question mark on the sound card driver. If so, just reinstall the sound card driver and restart the computer to repair it. Usually the driver of the sound card and the motherboard drive the CD-ROM drive together. Insert the CD matching with the motherboard into the CD-ROM drive, and select the sound-related program installation according to the prompt, which can be completed step by step. (xyz58 19 idea space-time)

Still no, uninstall the sound card driver that the hardware device is incompatible with (that is, open the device manager >; Right-click on each device) > properties > drivers > digital signature program >: there is no driver for "Microsoft Windows Hardware Compatible Publisher" in >; This is a driver that is not digitally signed by Microsoft. If there is such a drive in the system, you will love all kinds of problems. ) After booting, reinstall the downloaded sound card driver (WHQL) that has passed the Microsoft digital signature authentication, and then restart the computer. If you can't find it, download a driver wizard or driver life, and it will automatically help you find the corresponding driver in the networked state. ★ Note ★ Be sure to download and install the certified driver ★ (XYZ 555)

Win 7 has no sound. Actually, there is something wrong with the file Windows/System/Drivers/WDMAudio. INF _ x86 _ Neutral _ AED2A4456700DFDE on disk C, at this time, you just need to delete this file and copy it to a normal file with the same name! Remember to get administrator permission before deleting, otherwise it cannot be deleted! (xyz58 19 idea space-time)