Quicktime not working

[babyj]

My Macbook Pro wouldn't boot (grey screen, spinning circle) and I ended up reinstalling ML which fixed the problem. Except Quicktime is no longer playing any media files, giving an error message of "...could not be opened. An unknown error occurred (-101)".

Tried deleting the Quicktime plist files but it didn't make any difference.

Any ideas?

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Ignore that.

Rebooting fixed it.

 

[miquee]

I had the same problem cause I didn't have soundcard drivers installed, after soundcard started working Quicktime started also...