|I now have another thought.|
I have seen on this or some other forum where a person was having problems with a signal from a Radio Station was coming over her speakers.
I am not sure, but I think they make sound cards that are shielded.
Meaning all or part of the card is enclosed in a metal case.
Also, when A.C. is converted to D.C. like Computers do, the remaining small amount of A.C. is filtered out.
If it is doing a poor job of Filtering, you would get Static.
All of this is related to Electronics, not Windows.