ActiveX in IE - disabling it outside the browser?

I'm using ActiveX to create textfiles:

var fso = new ActiveXOb开发者_Python百科ject("Scripting.FileSystemObject"); 
var fh = fso.CreateTextFile(...

I know that the user needs to click ok in a popup in order to allow the textfile to be created. But is there a guarantee that an activex control can be used as long as the user accepts it in IE, or is there any other settings that might prevent it (in windows)?

Thanks

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It could be blocked by a firewall or ant-virus product.

ActiveX in the browser is a well known security issue. The example you've given is exactly the kind of thing that a decent anti-virus product should pick up and strip out of the code before it even reaches the browser.