Acer Aspire automatic repair keeps looping and won't diagnose he

Hello,

Hi I have an Acer Aspire laptop it boots up and goes into diagnosing repair and keeps looping through that and won't refresh won't go to the desktop and just says can't be repaired or diagnosed shut down and it gives me log file C Windows system32 logfiles SRT that start Trail. Text how can I fix this I've tried everything please help desperate.