I am having a lot of trouble downloading itunes.My latest error message is that MediaToolbox.dll is missing. I have been trying to fix this for three days now .And it all started with the last update .Can anyone help?

I am having a lot of trouble downloading itunes.My latest error message is that MediaToolbox.dll is missing. I have been trying to fix this for three days now .And it all started with the last update .Can anyone help?

Taken at face value, you're having trouble with an Apple Application Support program file there. (Apple Application Support is where single copies of program files used by multiple different Apple programs are kept.)
Let's try something relatively simple first. Restart the PC. If you're using Vista or 7, now head into your Uninstall a program control panel, select "Apple Application Support" and then click "Repair". If you're using XP, head into your Add or Remove Programs control panel, select "Apple Application Support", click "Change" and then click "Repair".
If no joy after that, try the more rigorous uninstall/reinstall procedure from the following post. (If you've got XP, although the procedure is for Vista and 7, just read "Computer" as "My Computer", read "Uninstall a program control panel" as "Add or Remove programs control panel" and assume the system is 32-bit, and you'll be doing the right things.)
Re: I recently updated to vista service pack 2 and I updated to itunes 10.2.1 and ever

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    For general advice see Troubleshooting issues with iTunes for Windows updates.
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