i have been blocked from writing skill test due to going back in window due to my pc shutdown

Sorry, you have been blocked from the assessment due to unfair practices.

Please contact assessment organiser for further details.

You will be able to check your report card after the end of assessment.

You will be able to retake this assessment after a few days

I think further you can turn on dnd for the safe side
So,that codechef platform doesn’t detect anything suspicious