Error in Starting mySql server from command prompt
The same error can also happen if mysqld.exe is already running. Just kill the process.
Folder "program files" in windows is usually restrict write for non-admin accounts, so you can either:
- run mysql under admin account - not very good practice
- set write rights for this folder for all - not very good practice
- move data storage into another place and change my.cnf appropriately - right one