When you uninstall the old MYSQL database service from your computer, first stop the MYSQL service in the WINDOWS service. Go to the Add and Delete program in the control panel to delete it. However, if you cannot completely delete the MYSQL service, you must clear your MYSQL service in the registry.
There are several places:
1. HKEY_LOCAL_MACHINESYSTEMControlSet001ServicesEventlogApplicationMySQL directory deletion
2. HKEY_LOCAL_MACHINESYSTEMControlSet002ServicesEventlogApplicationMySQL directory deletion
3. HKEY_LOCAL_MACHINESYSTEMControlSet001ServicesEventlogApplicationMySQL directory deletion trolSetServicesEventlogApplicationMySQL directory deletion
As shown in the figure below:
(T114)