Resolving IE failure to install Flash Player ActiveX

Solve the problem that IE cannot install Flash Player ActiveX.

Problem description:
After Adobe Flash Player 9.0.64.0 ActiveX is installed, other Flash Player versions cannot be installed. That is, the removal of Flash Player Uninstaller 4.0.0.3 is invalid.

Error message 1:
The Adobe Flash Player version you are trying to install is not the latest version. Visit the http://www.adobe.com/go/getflashplayer for the latest and safest version.

Error message 2:
Error 1904. Module
C: \ WINDOWS \ system32 \ Macromed \ Flash \ FlDbg9d. ocx
Failed to register. HRESULT-2147220473.
Contact your support personnel.

Error 1904. Module
C: \ WINDOWS \ system32 \ Macromed \ Flash \ Flash9d. ocx
Failed to register. HRESULT-2147220473.
Contact your support personnel.

Error 1904. Module
C: \ WINDOWS \ system32 \ Macromed \ Flash \ Flash8c. ocx
Failed to register. HRESULT-2147220473.
Contact your support personnel.

Solution:
Modify the registration code, execute regedit, and find the following location:
[HKEY_LOCAL_MACHINE \ SOFTWARE \ Macromedia \ FlashPlayer \ SafeVersions]
"6.0" = dword: 00000058
"7.0" = dword: 00000046
"8.0" = dword: 00000023
"9.0" = dword: 002f0000
Delete the binary data of "9.0.

PS. Later, we found that using Flash Player Uninstaller and adding the/clean parameter to the command column can also clear the registration code.