Error -43 when updating to ios 5

Updated to iTunes 10.5 this morning. When updating my iPhone 4 (4.3.3) I received the following error:
"An error occurred while backing up the iphone (-43). Would you like to continue to update this iPhone? Continuing will result in the loss of all contents on this phone."
Error -43 is not listed on the support page.
My iPhone has a recent backup from a sync today. What will happen if I select "continue" and lose the contents on my iphone?

Why is there not a reply from Apple. Please tell us if we should continue or wait for YOU to fix bug. What is the delay as your install says this could take hours.

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I am trying to update my GSM iPhone 4 to iOS 5. It successfully downloaded without issue. When I try to update my device, it goes through the installation process but I get the following message: "The iPhone "iPhone" could not be restored. An unknown error occurred (14)." This has occured at least 30 times over the past two hours. My phone is bricked an unusable. Does anybody know how to get around this?

no need to restart machine
no need to re install itunes
no need to unplug and plug back your iphone cable to machine
no need to return to apple support
just simply go to
C:\Documents and Settings\User\Application Data\Apple Computer\MobileSync\Backup
you will be able to see a several list of back up folders
just cut and paste to drive D: or you can delete it if your really sure the latest back up
to check the latest back up folder just right click the folder / properties and check the date and size of the back up folder
connect the iphone to machine and click restore.
have done this to several iphones
issue RESOLVED
any questions you can email me at [email protected]
thank you

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I recently bought a new chager hopping it would change the error message a was getting when trying to update.....but it did not work. How do I keep from getting that error message? It says "An error has occured (-43) in occurance to continue will result in the loss of all contents on your ipod". HELP

Try these previous dscussions:
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Error -43: Apple Support Communities

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Hi,
Thanks for your reply. But the problem is that i can do anything with my iPod at all. When you first get an iPod you can turn it on and you get the connect to iTunes screen but i can't turn my iPod on at all. Not a thing.
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Errors related to third-party security software
Error 2, 4 (or -4), 6, 1000, and 9006
Follow the steps to troubleshoot security software. Often, uninstalling third-party security software will resolve these errors.
There may be third-party software that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your registry. An incorrectly set default packet size can cause these errors. 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).
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Verify that communication to albert.apple.com or phobos.apple.com isn't blocked by a firewall or other Internet security setting.
Discard the .ipsw file, open iTunes and attempt to download the update again. See the steps under "Advanced steps > Rename, move, or delete the iOS software file (.ipsw)" below for file locations.
Restore your device while connected to a different network.
Restore using a different computer.
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Error 8000067 when updating version 5.1 on Ipad. please help to avaoid to loose everything. thanks and regards

iOS: Unknown error containing '0xE' when connecting to a Windows PC
http://support.apple.com/kb/TS3221
Update and restore alert messages on iPhone, iPad, and iPod touch
http://www.buybuyla.com/tech/view/012953a0d412000e.shtml
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http://support.apple.com/kb/TS1275
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http://support.apple.com/kb/ht4097
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http://support.apple.com/kb/HT4623
If you are currently running an iOS lower than 5.0, connect the iPad to the computer, open iTunes. Then select the iPad under the Devices heading on the left, click on the Summary tab and then click on Check for Update.
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 Cheers, Tom

When updating to iOS 5.0.1. get the err -3259, thus unable to install new iOS. The message I receive goes: "THE NETWORK CONNECTION TIMED OUT. MAKE SURE YOUR NETWORK SETTINGS ARE CORRECT AND YOUR NETWORK CONNECTION IS ACTIVE, OR TRY AGAIN LATER."

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I have a quick wifi connection (Mac shows it as about 35 megabits) but I couldn't get the 5.0.1 OTA to work, I had to do it via cable to my computer's iTunes - and as I was already on iOS 5 it was only a small download, basically the same size as the OTA size.
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Error 1669 after updating to ios 7, Error 1669 after updating to ios 7

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Error -43 when updating to ios 5

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