First ~Download MSCOMCTL.OCX~ . Then Back up your current copy of MSCOMCTL.OCX and copy the new version to the same file location. This file should be located in the WINDOWS\SYSTEM directory on your C: drive (for Windows NT and 2000: \WINNT\system32).
Once you did that, use your mouse, click on the "Start" button and then click on "Run".
According to your Operating System, type the following command to register this library file:
Windows 95, 98, or Me:
Windows NT or 2000:
You should see a message saying "DllRegisterServer ... succeeded" and done you are.