Mysql reinstallation failure solution I believe that everyone has had the experience of reinstalling MySQL. If you reinstall MySQL, it is basically not in the last step, unless you reinstall the operating system, the reason is that the registry in the system is not deleted from www.2cto.com. The following is a summary of my experience, all of which are blood lessons: 1. Type regedit in "run" to enter the registry. 2. Delete the HEKY_LOCAL_MACHINE/SOFTWARE/MYSQL directory 3. HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Services/Eventlog/Application/MySQL directory Delete 4. HKEY_LOCAL_MACHINE/SYSTEM/ControlSet002/Services/Eventlog/Application/MySQL directory Delete 5. HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Eventlog/Application/MySQL directory to delete ControlSet001 and ControlSet002 in the registry, not necessarily 001 and 002, which may be ControlSet005 or 006, delete all. Delete MySQL folder 7 under C:/Documents ents and Settings/All Users/Application Data. Finally, uninstall MySQL. 8. Delete the folder in the MySQL installation path. 9. Restart your computer. OK! ~~~~ (Currently, the above methods can be reinstalled successfully when the MySQL version is MySQL 5.0. Other versions need to be verified)