Hi Gary. I think this comes from a clash of drivers. On the CCDLabs site there is a link to download a drive removing tool. It's a link to Tom Van der whatsit's site if I remember rightly. I have them on another computer so if you can't find them, let me know and I should be able to send it to you. That removes all drivers for either QHY5 and/or QHY8. Do that and then reinstall ONLY one set of drivers and from memory again, I think the one to use is the standard one, not Tom van der whatsits.
Theo will know.
Peter
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