Fix VANGUARD ERROR: VAN 57
Restart your pc
Still facing the same issue, follow the steps below
Open the Run and type regedit and click ok
Navigate to HKEY_LOCAL_MACHINE → SOFTWARE → Microsoft → WindowsNT → CurrentVersion and click on the folder: "Image File Execution Options". It will contain a file called: "DevOverrideEnable". Open it with two clicks. Change the value from "1" to "0". Press "Ok" and restart the computer. The problem should be solved.