1. First, download this file from Baidu mscomctl.ocx online.
2. After the download is completed, unzip it to the desktop first, and then copy it to the specified location.
32-bit C:Windowssystem32
64-bit C:WindowsSysWOW64
Maybe the system drive of some Youyou is not the C drive, you can just change it yourself.
3. Administrator rights are required when copying. A dialog box will pop up and select "Continue".
4. Finally, we need to run the command line as an administrator to register.
32-bit regsvr32 %windir%system32mscomctl.ocx
64-bit regsvr32 %windir%SysWOW64mscomctl.ocx
Of course, this tutorial also applies to situations where other dll and ocx files are missing. The most critical step in the tutorial is to distinguish whether your current system is 32-bit or 64-bit, and then put the components into the corresponding locations. The rest is not too difficult. I believe everyone can solve the problem by referring to the tutorial.