Deux astuces XAMPP
1) sur xampp control, start et close : clic droit, propriété, exécuter en tant qu'administrateur
2) un script power shell pour réparer

# Based on this answer: https://stackoverflow.com/a/61859561/1956278

# Backup old data
Rename-Item -Path "./data" -NewName "./data_old"

# Create new data directory
Copy-Item -Path "./backup" -Destination "./data" -Recurse
Remove-Item "./data/test" -Recurse
$dbPaths = Get-ChildItem -Path "./data_old" -Exclude ('mysql', 'performance_schema', 'phpmyadmin') -Recurse -Directory
Copy-Item -Path $dbPaths.FullName -Destination "./data" -Recurse
Copy-Item -Path "./data_old/ibdata1" -Destination "./data/ibdata1"

# Notify user
Write-Host "Finished repairing MySQL data"
Write-Host "Previous data is located at ./data_old"
source : https://gist.github.com/josemmo/24e35f2b4984a4370ce2c164f5956437#file-repair-mysql-data-ps1-L1