I recently updated software and now I get an error message -45054 when I try to pull up itunes. anyone know why

I thought about trying to correct this by reloading itunes, but I'm not sure what will happen to all my music. I'm getting this error message on my mac not my iphone.
Thanks!

Open your QuickTime control panel (either via the Control panels, or by going "Edit > Preferences > QuickTime Preferences" in the Quicktime Player). In the Advanced tab, uncheck Enable Direct3D video acceleration:
... and click OK.
Quit the QuickTime Player if you have it open. Restart the PC and try watching the videos in iTunes again. Do they play now?

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