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Random Windows Background Sound while browsing in Tablet Mode

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I installed latest Firefox on my new Surface Pro 3 with Windows 10. When browsing web pages, quite often the Windows Background Sound (C:\Windows\Media\Windows Background.wav) is played, usually after the page has been loaded.

According to Process Manager, it's taskhostw.exe that is triggering the sound. However I have no idea why??? I see no notification or anything when the sound is played.

Can you help me?

I installed latest Firefox on my new Surface Pro 3 with Windows 10. When browsing web pages, quite often the Windows Background Sound (C:\Windows\Media\Windows Background.wav) is played, usually after the page has been loaded. According to Process Manager, it's taskhostw.exe that is triggering the sound. However I have no idea why??? I see no notification or anything when the sound is played. Can you help me?

All Replies (2)

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I attached a screenshot of the process manager when the sound just got monitored.

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I could specify the problem. It's when i'm typing something in the adress bar using the onscreen keyboard and choosing any other result than the top one, by touch. Weird, isn't it? Can anyone confirm?