Downloading Quicktime when "unknown error" occurs

I am unable to download QuickTime because when I run the download a sign comes
up saying that: "QuickTime 75_Panther could not be opened, because an unknown
error occurred", Further it says:"Try saving to disc first then opening the file". How and what do I do to take care of this?

1) i have the latest version of itunes (7.2.3?)
2) i have tried different CDs, but they all generate the same error
3) the CDs i'm using are not enhanced; they're just regular CDs
4) changing the format helps sometimes; instead of giving an error right away, it lets me import 1 or 2 songs before the error message appears
5) yup
the problem is actually worse now! now when i try to import a CD the entire iTunes application shuts down. any ideas anyone?????

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Unable to check for available downloads. An unknown error occured (1003)

I've been unable to download or update any applications or songs on any of my phones, ipads, or imacs. I just keep getting the messages, "Unable to download application." It's been this way for weeks. What can I do?

I've been getting this error with iTunes 11.1.3(8) -- latest version. I've avoided by de-selecting simultaneous downloads.
This coincides with log messages such as:
sandboxd: ([###]) xcscredd(###) deny file-read-metadata /Users
sandboxd: ([###]) apdpd(###) deny file-read-metadata /Users
iTunes: Possible unresolved transaction race -103/(iTunes/iTunes Music/Downloads/Netflix.tmp,(null))
iTunes: Possible unresolved transaction race -103/(iTunes/iTunes Music/Downloads,(null))
(yes, 103 above, yet 1003 error code, perhaps no relation)
The "transaction race" makes me think there's a Mutex that's being un-gracefully-waited-for, and the bail-out message is simply a 1003.
As a workaround, I've disabled/unchecked "Allow simultaneous downloads" in the download dialog (if you click the down-arrow in the upper-left of itunes window, the dialog shows you the downloads in progress/completed/pending; this checkbox is at the bottom) ...
So far, no recurrences, but we'll see.

We could not complete your itunes store request. An unknown error occurred (-42110) - happens when i click on a downloaded movie, tv shows work???

An unknown error occurred (-42110) - happens when i click on a downloaded movie, tv shows work???

"Error 3001," "-42110," or "5103"
This alert is related to iTunes Store movie rentals and authorization issues. Make sure you are using the most recent version of iTunes and QuickTime. They both can be downloaded free of charge. If your iTunes is up to date, remove the SC Info folder.
From: iTunes: Advanced iTunes Store troubleshooting

HT2292 hello i'm facing problem i downloaded iTunes version 11 32bit and after i installing the set up when i opened the iTunes a massages occur saying i tunes could not connect to iTunes store an unknown error occurred (-3212) even though my interne

Hello i'm facing problem i downloaded itunes version 11 32bit for windows 7 and after i installing the set up when i opened the iTunes a massages occur saying i tunes could not connect to iTunes store an unknown error occurred (-3212) even though my internet is on

Try this...
Triple click anywhere in the line below to select it and press Ctrl+C to copy it.
cmd /k netsh winsock reset
Press the WinLogoKey+R to open the run dialog, then Ctrl+V to paste, then press enter/return.
You should get something similar to this:
Reboot the computer and the problem should be resolved.
If it doesn't work then perhaps a full tear down and rebuild of iTunes will fix things. See Troubleshooting issues with iTunes for Windows updates for details.
tt2

When I try to open video files purchased through iTunes in Quicktime, I get the message: 'Error 23132: an unknown error occurred. This never happened until I updated iTunes, but when I try to go back to the previous version, I still get the message.

When I try to open video files purchased through iTunes in Quicktime, I get the message: 'Error 23132: an unknown error occurred. This never happened until I updated iTunes, but when I try to go back to the previous version, I still get the message. It is more convenient for me to play videos in Quicktime since iTunes is such a memory hog. Please help.

You may get better results if you switch to this alternate version: iTunes for Windows (64-bit - for older video cards) and, if needed, reinstall QuickTime. The new (nearly) all 64-bit version doesn't seem to play well with QuickTime. Perhaps if DRM authentication is required QuickTime needs to be able to see something that is part of the older 32-bit code.
tt2

My purchases show partially downloaded. When I attempt to resume the download I recieve an error message " an unknown error occurred -50" Itunes has charged for the download and sent a reciept however the shows wont play?

My Purchases show partially downloaded. When I attempt to resume the download I recieve an error message: "an unknown error occurred -50". I tunes has charged for the download and sent a reciept however the shows wont play?

I had the same problem so (assuming under the Purchased items in the Store you have a song stuck at 'Downloading'):
I went to Music, then Artists.
From there I chose the album.
The song that failed to download had the cloud symbol next to it.
I clicked the cloud symbol and the song completed the download for me.
(Please note this was in iTunes for Windows - I expect it to be similar in iTunes for Apple)
Message was edited by: UbergeekRFC - parenthetical note added
Message was edited by: UbergeekRFC - added note about song stuck as downloading

I've iPhone 4s, and I am trying to update it to iOS 5.1 I've downloaded the software from iTunes, but when I click to install it, it says: "There was a problem downloading the software for the iPhone 'Donnbjj1's IPhone'. An unknown error occurred (1480)"

I have an Iphone 4s 32gb and i'm trying to update it to ios 5.1. i've downloaded the software from itunes but when i click on it to install it to my actual phone it says: "There was a problem downloading the software for Iphone 'Donnbjj1's Iphone' . An unknown error occurred (1480)."

iOS: Resolving update and restore alert messages
For error -50: See error 13 and 14:
Error 13 and 14: These errors are typically resolved by performing one or more of the steps listed below:
Perform USB isolation troubleshooting, including trying a different USB port directly on the computer. See the advanced steps below for USB troubleshooting.
Put a USB 2.0 hub between the device and the computer.
Try a different USB 30-pin dock-connector cable.
Eliminate third-party security software conflicts.
There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry. Your default packet size being set incorrectly can cause this error. Contact the manufacturer of the software that installed the packet-size modification for assistance. Or, follow this article by Microsoft: How to reset Internet Protocol (TCP/IP) to reset the packet size back to the default for Windows.
Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.
Try to restore from another known-good computer and network.

"An unknown error occurred (-50)" keeps coming up when downloading music purchase?

"An unknown error occurred (-50)" keeps coming up when downloading music purchase, 3 songs from the album came through but the last one is having problems. I've refereed to the itunes store FAQ and tried the solutions provided, but still not working?
The firewall on the mac is turned on, however I don't have any Web Accelerators, Ad Filters and I've just recently uninstalled my Virus Protection Software.
I'm not sure how to go about fixing this problem, and the solution provided by Apple doesn't seem to help me at all.
Does anyone know? Thanks in advance! (:

iTunes: Advanced iTunes Store troubleshooting - http://support.apple.com/kb/TS3297 > Specific Conditions and Alert Messages: (Mac OS X / Windows) - includes list of iTunes error codes

HI, i'm having this error message [There was a problem downloading the software for the iphone "banster's iphone". An unknown error occurred (-23)] when im doing the upgrading to IOS 5. anybody know how to slove it? Thanks

HI, i'm having this error message [There was a problem downloading the software for the iphone "banster's iphone". An unknown error occurred (-23)] when im doing the upgrading to IOS 5. anybody know how to slove it? Thanks

Yep, me to exactly the same problem, the error message keeps telling me to check my internet connection or try later. Nothing wrong with my internet connection. Is it an apple server problem?

Getting "An unknown error occurred (-50)" when trying to download my purchases

For the past few weeks I've been getting "An unknown error occurred (-50)" when trying to download my purchases. I've tried downloading from past purchases and by clicking on the cloud symbol on the files in iTunes itself. Same every time.
I'm using iTunes version 11.3.1(2) running OS 10.9.4.

Hi lachima,
Welcome to the Apple Support Communities!
I understand that it is frustrating when you are getting an error when trying to download previously purchased content. There are some great troubleshooting steps for this specific situation though. I recommend reading over and using the steps provided in the attached article to help you get this resolved.
iTunes Store: "Error (-50)" when downloading purchased content
http://support.apple.com/kb/TS1583
Have a great day,
Joe

When i try to download a game from the app store it says unknown error occurred... what do i do

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Payment problem
1. Check credit card number
2. Check security code
3. Billing Address must be the same as credit card
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TS3297 When I try to download music an error message appears that says "We could not complete your itunes store request. An unknown error occured (-1202)

When I try to download music an error message appears that says "We could not complete your itunes store request. An unknown error occured (-1202)

Perhaps try the "Error 3001," "-42110," or "5103" section in the Specific Conditions and Alert Messages: (Mac OS X / Windows) section of the following document:
iTunes: Advanced iTunes Store troubleshooting

HT1766 I was halfway through downloading iOs7 when it froze, so I turned it off and now it is in the recovery mode and says to restore it. I tried to restore it and it comes up with the code "An unknown error occured (3194)" What can I do?

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vTanny wrote:
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Why do I get a message that an unknown error occurred when trying to download a NYTimes cross-word using AcrossLIte, which happens only on Firefox 4?

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*kb.mozillazine.org/Unable_to_save_or_download_files
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Downloading Quicktime when "unknown error" occurs

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