Problem
Migration performance is negatively impacted by Microsoft Defender background processes.
Cause
Microsoft Defender can have significant performance impacts on Windows PCs, particularly on low-spec machines with <= 4gb RAM, <= 2 core CPU, etc.
Solution
Add the following Microsoft Defender exclusions by navigating to Windows Security > Virus and Threat Protection > Manage Settings > Add or remove exclusions:
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Folder – C:\Users\[username]\AppData\Local\user-led-migration-updater
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Process – C:\Users\[username]\AppData\Local\Programs\user-led-migration\Shinydocs Migration.exe
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Process – C:\Users\[username]\AppData\Local\Programs\user-led-migration\resources\bin\UserLedMigration.exe