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Screeching noise when I turn on my computer

If you have a very high pitched noise from your computer when you start it up it may be caused by the microphone boost being set too high. To reduce the microphone boost follow the instructions below:

1. Click on your Start Menu.

2. Select Control Panel.

3. Select View by Small Icons or Large Icons.

4. Select Sound.

5. Select Recording tab.

6. Click on Microphone and select Properties.



7. Select Levels tab.

8. Slide Microphone Boost bar to the left until it is at +10.0dB.



9. Select Ok.


Further Troubleshooting


Changing my microphone boost to +10.0 dB hasn’t fixed this issue.

You may further reduce the microphone boost if +10.0dB has not resolved the issue. Use the slide bar to reduce this further and then select Ok to apply the settings. Keep reducing the microphone boost until the issue has been resolved.





I don’t want to disable or reduce the microphone boost on my computer, are there any other options to fix this issue?

There is another solution that is available however this is not applicable to all systems. For instructions please refer to the below steps:


Windows 7

1. Click on the Start Menu.

2. Select Control Panel.

3. Select View By: Large Icons.

4. Select Sound.

5. Select the Recording tab.

6. Click on Microphone and select Properties.



7. Select the Listen tab.

8. Untick the item Listen to this device.



9. Select Ok to apply the settings.


Windows Vista

1. Click on your Start Menu.

2. Select Control Panel.

3. Select Classic View.

4. Select Realtek HD Audio Manager.

5. Select the Microphone tab.

6. Select Mute on the Playback Volume.



7. Select Ok to apply the settings.


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