Hello,
The SrtTrail.txt file usually records various events during the system startup process, especially operations related to startup repair or system recovery. When encountering startup problems, Windows will generate this log file to help diagnose the problem. The error you encountered when restarting the computer after disabling BitLocker encryption may be related to the hard disk. It is recommended that you check the event log to see if there are any errors related to the disk.
Best regards
Zunhui