This might be a fairly specific question but my WiFi card was having issues (the Wifi:No Hardware Installed error). I started using an usb wifi adapter. The issue is that now none of my iTunes media is playable. I suspect that these are tied to the the hardware WITH the specific mac address but this seems unreasonable (ie to have Apple fix it and have my laptop for several days)? Is this the issue? Is there a workaround? Can I reauthenticate it? The error I get is:

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Blatantly stolen from Apple's support website, Make sure iTunes is closed and go into your iTunes folder and delete the following files:

iTunes Library Extras.itdb iTunes Library Genius.itdb

You may even have an additional "Extras" file with a time/date stamp on it and delete that as well.

Of course, please do this at your own risk of losing any preferences that these files may contain. I don't know exactly what these files do, but I've done this fix for a number of iTunes related issues and it works almost every time.

Hope this helps!

Apple Support Community

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  • thx George, I tried this twice but no dice. A good start - let me google a bit to see if there is something I can work with. – timpone May 25 '13 at 22:43
  • There are other answers also listed at the Support Community link I provided, I reproduced the one that seemed to have the largest number of people stating success with it. It IS possible that it is simply the fact that your MAC address is part of how iTunes identifies you and that you need to re-authorize. – George Spiceland May 25 '13 at 22:52
  • if by re-authorize you mean login with uname and pwd, I've done that - in fact, that's how I get that error. That's why I'm concerned because I feel like the notion of authorization involves my builtin wifi card which is now non-functional :-( I'll look through but I've tried most of the other things. thx again – timpone May 25 '13 at 22:56

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