XAMPP MySQL service crash after reboot

This one helped for me:

Open shell from from control panel and start mysql with this command:

mysqld –-console –-skip-grant-tables –-skip-external-locking

Open another shell from control panel and repair database with this command:

mysqlcheck -r --databases mysql --use-frm

Stop mysql, close shells and restart mysql normally.

based on: Re: Corrupt mysql.users How to fix

I got this problem like you . I have solved this problem like below.

Copy from xampp/mysql/backup folder and paste in xampp/mysql/data folder except ibdata1 file.

If you replace ibdata1 file from xampp/mysql/data then some database you will get error table does not exist.