Try disabling Windows sounds in Control Panel/Sounds then in your Windows hardware sound properties select disable for all unused inputs and all non ASIO card outputs.   

Windows core frequency is irrelevant when ASIO is in use so it does not matter if the displayed system frequency shows different from your hardware that uses ASIO.

Be careful not to set the buffer or latency setting too low.  Mine is set at 128 samples,  2.8ms  and 64 note Polyphony.

Ian

I disabled Windows sounds but couldn't find the way to disabling unused inputs and non-ASIO outputs (I'm not computer-illiterate but not much of a techie).

I left the buffers and other settings alone.

Worth noting: I was running Vista on this computer when I downloaded and used the Stage Trial software for several days without any problem. I did a recovery on the hard drive at that point and installed XP in the process because that was what was on the recovery disks I got from Lenovo for this several years back. Even so, I had no trouble with the Trial version I then downloaded nor, at first, with the paid-for Stage. Then the problem was intermittent, now each time I load it, as I said in my original posting.

Thanks very much.

We need to know more to help you: are you using PianoTeq stand-alone or in a DAW, If yes, which one? What soundcard do you use, what CPU, etc...

I'm running XP Pro Version 2002, 2.00 777mhz, 3 GB RAM

SoundMAX Integrated Digital HD Audio

Not sure about stand-alone vs DAW. I downloaded Stage and the ASIO driver and plugged in my keyboard.

Thanks.

Windows core frequency is irrelevant when ASIO is in use so it does not matter if the displayed system frequency shows different from your hardware that uses ASIO.

Be careful not to set the buffer or latency setting too low.  Mine is set at 128 samples,  2.8ms  and 64 note Polyphony.

Ian

I re-downloaded the ASIO driver and that seemed to work for a short time, then it reverted and further downloadings don't help.

I'm running XP Professional and Pianoteq Stage.

Any ideas?