However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully.
For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:.
To do this, follow these steps:. Expand Services , and then click HidServ. In the right pane, right-click Type , and then click Modify. In the Value data box, make sure that the value is set to 20 , and then click OK. Expand HidServ , and then click Parameters. Note If the Parameters registry key does not exist, follow these steps:.
On the Edit menu, point to New , and then click Key. In the right pane, right-click ServiceDll , and then click Modify. Note If the ServiceDll registry value does not exist, follow these steps:. Verify that there are no spaces before, after or in this value. Repeat steps 5 through 10 for each registry key that contains "ControlSet" in the key name. Then, repeat steps 5 through If the issue persists, test the keyboard with a different computer. If the keyboard does not work correctly with the other computer, contact our Order Desktop to obtain a replacement keyboard.
To do this, call For more information, click the following article number to view the article in the Microsoft Knowledge Base:. Comfort Curve Keyboard More Need more help? Expand your skills. Get new features first. Your computer may also behave erratically if there is some problem with the Windows registry or the system is infected with a troublesome virus or a spyware.
To rule out these problems, use a reliable registry tool, such as RegServe to perform a thorough registry scan and clean up. The first thing you need to ensure is that your computer has a sound card installed on it. To do this, click Start button, and then in the Start Search box, type Device.
Next, select Device Manager from the Programs list. In the Device Manager window, check Sound, video and game controllers category to see if an entry for a sound card is there. Many times, sound cards are displayed in the Other devices category so you must check this also to see if your sound card is listed there. Many computers, especially laptops and notebooks come with built in speakers. However, at times, you may want to use external speakers for better sound quality.
Very simple mistakes may cause problems and prevent you from making the speakers work. Scroll down and click Playing Audio. Click Run the Troubleshooter. Select your audio device Realtek R audio for most people , and click Next. Follow the instructions to fix any audio problems detected. See what playback device is selected. If the sound is not playing from your computer, this may be because the wrong playback device is selected. For example, if the computer is set to play sound through headphones, sound may not come out of external speakers.
Use the following steps to see what playback device is selected: Click the Windows Start icon in the taskbar. Type "Control Panel". Click Manage Audio Devices. Click the correct audio device Realtek Audio for most people. Click Apply.
You can also right-click on an audio device and click Test to test the audio device and listen for a sound. Disable audio enhancements. Some audio enhancements can cause audio issues. Use the following steps to disable audio enhancements: Click the Windows Start icon in the taskbar. Click Sounds Click the Playback tab. Click an audio device. Click Properties. Click the Enhancements tab. Uncheck the "Disable all enhancements" or "Disable all sound effects".
Repeat for all other sound devices. Select a different audio format. Use the following steps to select a different audio format: Click the Windows Start icon in the taskbar. Click the Advanced tab. Use the drop-down menu at the top to select an audio format i. Select a different audio format if you hear no sound. Check the sound card.
Most modern computers have a built-in Realtek sound chip used to process audio. However, some older computers may use a third-party sound card to process audio. If your computer speakers plug into a sound card on the back of your computer, you may need to open your computer and make sure the sound is installed properly. Use the following steps to make sure a sound card is connected to your computer: Right-click the Windows Start icon in the taskbar.
Type "Device Manager. Double-click Sound, video and game controllers. Check to make sure an audio device is listed below "Sound, video and game controllers. Ensure your sound driver is enabled. Use the following step to check to make sure your sound driver is enabled: [3] X Trustworthy Source Microsoft Support Technical support and product information from Microsoft. Go to source Click the Windows Start menu.
Click System Click Sound in the menu to the left. Click Device Properties near the top of the Sound menu. Ensure the box next to "Disabled" is unchecked. Check for updates. Sometimes, your audio drivers may be out-of-date and causing problems on your computer. Use the following steps to check for Windows updates: Right-click the Windows Start icon in the taskbar.
Right-click your audio driver Realtek Audio for most people. Click Update Driver. Click Search automatically for updated driver software Follow the instructions to install any new drivers. Roll back your audio driver. If you started experiencing audio problems after a Windows update, you have the option to roll back your audio driver to the previous driver version.
Use the following steps to roll back your audio driver: Right-click the Windows Start icon in the taskbar. Double-click your audio driver Realtek Audio for most people. Click the Driver tab at the top. Click Roll Back Driver. Uninstall your audio driver and restart. This will prompt Windows to reinstall your sound drivers. Use the following steps to uninstall your audio drivers: Right-click the Windows Start icon in the taskbar.
Right-click your audio driver Realtek R Audio for most people. Click Uninstall Device. Click the checkbox next to "Delete the driver software for this device". Click Uninstall.
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