Problems:

• [mysql] Error: MySQL shutdown unexpectedly.
• [mysql] This may be due to a blocked port, missing dependencies,
• [mysql] improper privileges, a crash, or a shutdown by another method.
• [mysql] Press the Logs button to view error logs and check
• [mysql] the Windows Event Viewer for more clues
• [mysql] If you need more help, copy and post this
• [mysql] entire log window on the forums

Solution:

1. Go to your xampp folder
2. Then go to mysql/data/
3. Delete ibdata1 or you may rename it to ibdata1.bak
4. Start MySQL

It should fix it.