|>Yes, I have scanned for virus-trojan-malware, but problem persists.|
>Using: Microsoft Secuity Essentials (this seems to be a replacement for Windows Defender?); Clamware Anti-Virus (runs manually--does not seem to be TSR program); Spybot (ditto); also, once weekly or more often if PC seems slow, I run Eusing (free version) Registry Cleaner.
>I watched CPU performance when the s-l-o-w-d-o-w-n of the playback of music occurs, and indeed, the CPU usage spikes exactly coincident with the slow-play phenomenon. I have 33 processes running normally, but I am pertty certain that I was doing this before problem started.