You could try reinstalling msn ,however i dont think this will solve your problem there are many appliances in the home including strip lights that can cause static. speaker wires are not sheilded therefore they will pickup static. Intermttent faults can be more difficult to find could be anything from domrstic central heating pump to faulty wires in the mike.I afraid its a process of elimination.
nothing has moved, its been fine for months , i have had skype installed but since removed it as it hijacked my sound card so i took it off - could it be something to do with msn 7.5, all was well on the previous version
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