PC does not recognize the USB serial port after some days

[A_neves]

robertferanec do you think that using optocouplers on UART line to isolate the FT2232D circuit could be a good solution?

I think that I am not properly filter the noise coming from my GST60A12-P1J power suply.

[robertferanec]

It is very hard to answer your question without seeing and measuring your whole system. Also, as I said, 230V topic is not my area, so I am not sure what exactly the problem is and what could solve it. But I would probably try a different adapter - a transformer adapter.