The Startup Repair Tutorial in Windows 10
Step 1: Boot to Advanced Startup Options
Step 2: Select Troubleshoot.
Step 3: Select Advanced settings.
Step 4: Select Startup Repair.
Step 5: If prompted, submit credentials for approval using an administrator account.
Enter the specified administrator's password and click/tap Continue.
Step 6: Begin Repair will now begin "diagnosing your PC" and attempt to repair it automatically.
Step 7: If the repairs are unsuccessful, a summary of the problem will be displayed in the log file.
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