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My HP desktop has been acting up now the Boot manager is gone missing where did it go

To fix this, use these methods to troubleshoot this Windows Start error. Method 1: Run Startup Repair from Windows Recovery Environment. Method 2: Rebuild the boot configuration data (BCD) from Windows Recovery Environment. Method 3: Run System Restore from Windows Recovery Environment. Method 4: Use Startup Repair on a computer that has a preinstalled recovery option on your computer If none of these help, you can also refer to another post to see if they work for you. Hope my answer comes in handy.