If it’s running, then simply stop it. If it hasn’t run yet, then go to the AV’s Scheduled Scans and delete them (there are two I believe). But, it is strongly recommended that you do perform a full scan as CIS might not be able to function correctly or detect/halt any pre-existing infection(s).
edit: I see. The you’ve-not-done-a-full-scan (which you haven’t) yellow icon bothers you and yet the infection risk doesn’t? Oh well.
Sorry, I personally do not know enough to respond to such questions on the risks and probabilities of CIS being installed where pre-existing infections are present. But, I do suspect that part of the answer may well have some relevance to your last question though.
IMHO first scan can detect unknown malware by cloud analysis of unknown progs. If cloud scan is enabled.
It is always emphasized that CIS must be installed on the clean comp.
IMHO if there is suspicion that infection is present then D+ must be not in “Clean PC Mode” but in “Safe Mode” ain’t it so?