Acer Aspire s3

When i turn on my laptopit says preparing automatic repair then says diagnosing your pc then reloads continuously. What can i do to get it to properly boot or load up functioning back to normal for use?

Hello. First, I would power off the laptop, and remove wall power and battery ( if the battery is removable ). Press the power button and hold for 1 full minute. Reapply ONLY wall power and try to boot. If you still have the issue and if you can get to a boot recovery menu, you MAY need to refresh your PC using this MS article

Cheers