Adam.
Скинете мне по имейл файл лицензии - договорюсь о даунгрейде, ещё и дату попрошу увеличить.
А пока что ответ таков:
This is without a doubt the result of low available system resources.
When constantly opening and closing tabs in this sort of manner, while rendering and streaming can result in high system usage and memory allocation.
Needless to say, Avast processes do consume memory, disk and CPU.
With that being said, there should be no surprise to find that there is an increase in system performance when Avast services are disabled.
It is impossible to know the exact cause without knowing much more about the machine, the end result is an absolute sign of insufficient system resources - not the result of the avast processes interfering with the sound device.
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Пока оставим такой вопрос из всех этих "много букв": а какая у Вас конфигурация ПК?