Hi again,
Another BSOD, this time when I tried to reboot. I had deleted those keys as you suggested (without any problems).
Now to uninstall Kaspersky. I vaguely remember a similar problem a few years ago, when I was also advised to remove the AV I was using - may have been ESET?
Any point in uploading another zip file? The error was the same - DRIVER_POWER_STATE_FAILURE
Thanks,
BK