Windows7 no sound windows7 no sound solution

Question: I don't know what's going on, there is no sound when I boot. Let's see what's going on? Can solve it.
Answer:
1, check the sound card, cable, and speakers and other devices are connected properly; run anti-virus software for anti-virus;
2, right-click "My computer" - rdquo;----“ Attributes---<quo;Hardware>----<quo;Device Manager",Open“Sound, Video, and Game Controller” If yes, reinstall the driver of this device to solve it;
3, when there is sound but no small speaker, open the control panel ---- sound and video equipment --- volume, in the volume icon Put in the taskbar & rdquo; before the check mark;
4, no sound and no small speakers, open the control panel ---- add and remove programs --- add and remove Windows components, in the "attachments and tools ” Before hitting the checkmark, click “Next”, then, shut down and restart, the system will prompt to install new hardware, follow the prompts to install; no microphone:
5, double-click the small speaker--option-- Attribute--put the hook in front of “microphone” Double-click the bottom right corner of the small speakers to adjust, and then locate the microphone option. Just set it up. In the sound interface, click on the option —— attribute, which has a microphone and a check mark.
6, uninstall the sound card driver, re-install or upgrade the audio driver;
7, when installing the sound card driver appears "ldquo; can not find the AC chip", suggestion, there may be computer poisoning, or because Incorrect operation to delete the sound card driver, or internal software conflict resolution is to reinstall the system and driver
8, simply ignore it, wait for a while after shutdown, then restart, sometimes the sound problem will solve You may wish to try
9, start & mdash; control panel & mdash; sound and audio equipment & mdash; sound, see if it is silent, then select windows default
10, click start-run, enter regedit , Enter, this opens the registry, click HKEY-CURRENT-USER, click on the ControlPanel item, and then click on the Beep in the Sound below to change its value from No to Yes. Is it heard again? Long-lost switch machine sound
11, deleted the original account, create a new account, so the switch machine has a sound, may be the user profile The problem caused by the error, you can first open the guest user guest, try again to see if there is a switch machine sound, if any, you can use the above method, first create an administrator account, then click on your problem The account, and then press the prompt to delete, in the process of deleting it will also prompt whether to retain the original account file, it is best to back up the favorites when deleting, as well as the installation software created in the start menu Folders, you can copy them in the past and get it