steps:
stop mysql xampp
1 - create some backup folder "data_1"
2 - from your current xampp/mysql/data folder move core folders and all files (like 'mysql', 'performance_schema', 'phpmyadmin', 'test' and all files to new backup folder
3 - from xampp/mysql/backup foder - move all to you xampp/mysql/data folder (so it is like override code folders/files from backup)
4 - from you beckup 'data_1' folder , copy file ibdata1 to /xampp/mysql/data folder
restart mysql
https://stackoverflow.com/questions/18022809/how-to-solve-error-mysql-shutdown-unexpectedly
