MSINET.OCX (Microsoft Internet Transfer Control) is a legitimate file, which allows people get the access to the Internet. This file is important for viewing web pages, so, if you noticed it on your computer, you should keep it. However, Windows Vista no longer supplies MSINET.OCX what may cause this error message on your computer's desktop:
msinet.ocx not correctly registered:file is missing or invalid
In order to fix it, you should download this file from the Internet. We highly recommend choosing reputable websites for that.
Malicious files may have identical names to legitimate files, so you should be very careful with MSINET.OCX. This is done for hiding viruses in the system. We highly recommend checking the system with updated anti-spyware if you found this file in other folder, not in C:\Windows\System32! For that you can use Reimage or Malwarebytes MalwarebytesCombo Cleaner.