The solution to the last step when installing MySQL

Usually because you have previously installed MySQL uninstall

The following methods are effective for pro-test.

This is one of the more practical ways I've seen in the last few days:
1. Uninstall MySQL

2. Delete the installation directory and data storage directory

3. Query MySQL in the registry, delete all

4. Check MySQL in the C drive, delete all

5. Re-install just fine.

Note A configuration is selected during the MySQL5

Clean the PC before installing:
"Start → program → accessories → Notepad", copy the following text into (the black part), click "Save As", the path selected "desktop", Save the Type "All Files", the file is called "Clear system Lj.bat", it is complete. Remember that the suffix name must be. bat, double-click it to quickly clean up junk files, about a minute.

@echo off
Echo is cleaning up the system junk file, please wait a moment ...
del/f/s/q%systemdrive%\*.tmp
del/f/s/q%SYSTEMDRIVE%\*._MP
del/f/s/q%systemdrive%\*.log
del/f/s/q%systemdrive%\*.gid
del/f/s/q%systemdrive%\*.chk
del/f/s/q%systemdrive%\*.old
del/f/s/q%systemdrive%\recycled\*.*
del/f/s/q%windir%\*.bak
del/f/s/q%windir%\prefetch\*.*
RD/S/q%windir%\temp & MD%windir%\temp
del/f/q%userprofile%\cookies\*.*
del/f/q%userprofile%\recent\*.*
del/f/s/q "%userprofile%\local settings\temporary Internet files\*.*"
del/f/s/q "%USERPROFILE%\Local settings\temp\*.*"
del/f/s/q "%userprofile%\recent\*.*"
Echo Clear system garbage complete!
Echo. & Pause

The solution to the last step when installing MySQL