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Ok - an update of sorts.
I've run a full virus scan and can find nothing problematic.
Without running ClockMon, my clock is gaining about 20 - 25 seconds per minute. With it on, it resets every minute or so. I think the reset process involves it temporarily slowing the clock rather than simply setting it back. The result is that it runs at varying speeds if monitored by ClockMon.
Leaving the PC off for a few hours and turning it back on, the time is right when it starts but then careers out of control. So I don't think its the CMOS battery.
Linking to the web or a GPS won't help much unless it syncs every few seconds which I don't think it does.
I can manage for now - with ClockMon and guiding, I should be ok to image. But to do some photometry on short subs eg 1 - 2 minutes, I have a problem as the mount is moving at the rate that the system clock dictates not within its own timeframe - so I get smeared stars.
So - any other ideas (besides dumping the wretched pc - which is pretty tempting at the moment)?
Pete
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