COM & ActiveX

To run various applications your computer frequently utilizes little executable files such as ActiveX and COM. This is a site about registry and you are probably wondering how this affects registry. Well, ActiveX and COM data is contained in class IDs (CLSIDs) which can be found in registry. CLSIDs are an essential part of a very effective cog machinery that is working behind the scene to make sure programs are able to run. But what happens when the COM object is deleted and CLSID is still referencing this inexistent object? This scenario is not unlikely. You would start a program which would call CLSID which in turns references erased COM object. This would cause a command conflict and as a result system error would occur.

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Invalid entries in COM section of Windows registry (i.e. CLSIDs pointing to deleted COM) can be a source of computer errors and crashes. Furthermore theyt may even destabilize your entire system. So how to resolve this situation? Simple deletion of invalid CLSID will do the trick. You can do this manually (be sure that you are deleting invalid CLSID and not an active one) or automatically by using registry cleaner utility.