I keep getting "Unknown error occurred 21" while trying to restore

My iphone 4 will not turn on after being dropped. It wants to restore, I can connect to itunes and it detects my phone but at the end of the process after a minute of itunes saying "preparing iphone for restore" the phone goes back to the apple screen, disconnects from itunes and the error message pops up. Phone goes back to the itunes "plug in" screen. I have tried everything suggested on here, even had the battery removed and replaced because I saw on here that helped some people. I could pay for a new battery but if that doesn't work I have wasted my money. Any ideas?

Error 20, 21, 23, 26, 28, 29, 34, 36, 37, 40
These errors typically occur when security software interferes with the restore and update process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.
Also, check your hosts file to verify that it's not blocking iTunes from communicating with the update server. See iTunes: Advanced iTunes Store troubleshooting—follow steps under the heading Blocked by configuration (Mac OS X / Windows) > Rebuild network information > Mac OS X > The hosts file may also be blocking the iTunes Store. If you have software used to perform unauthorized modifications to the iOS device, uninstall this software prior to editing the hosts file to prevent that software from automatically modifying the hosts file again on restart.

Similar Messages

TS1436 I keep getting unknown error occured(4450) when trying to burn a CD...running Windows Vista, any help would be appreciated

I keep getting unknown error occured(4450) when trying to burn a CD, running Windows Vista...any help would be apprciated.

I had this issue to when trying to burn discs recently. I went into the CD creation settings in iTunes and I "unchecked" the option to "Include CD Text" and after I did that, the disc I had been trying to burn several times with error, actually burned without fail. Give that a try and see what happens.

HT201442 I am getting the error "ipad could not be restored. an unknown error occurred (3194)" while trying to restore. tried steps 2 n 3 but stil error persists!

I am getting the error "ipad could not be restored. an unknown error occurred (3194)" while trying to restore. tried steps 2 n 3 but stil error persists!

When I restart my iPad the connect to iTunes comes up and stays on until it shuts down again, I have read a report from Apple support suggesting I reinstall iTunes so I might try that again and also your suggestion which i shall also try, but thanks again - rg1547

An unknown error occurred (-1) while trying to restore Ipad 3 new

Happy iPad users, I may need some help from you please.
I’ve got a problem with my iPad new 32 GB WiFi + 4G LTE.
I bought it just recently in China and was using it for nearly one month without any issues.
Then at some point i started getting synchronization problems with iTunes and applications that I have downloaded did not run properly or simply won’t start on my iPad. Then I’ve lost cellular signal.
Trying to resolve the issues I had to reset iPad to factory settings and after that I could not register it with apple. I tried many times with no success.
Then I went through some internet articles and decided to restore my iPad and finally I’ve got my almost new iPad stuck is restore mode!!!
I cannot get it out of restore mode and I cannot get it restored.
When I try to restore it I get the following message:the ipad "ipad" cannot be restored. An unknown error occurred (-1)the ipad "ipad" cannot be restored. An unknown error occurred (-1)
The ipad "ipad" cannot be restored. An unknown error occurred (-1)
Here are the things I’ve done so far trying to restore it
Tried to restore in on Windows XP – no luck, same message
Tried to restore it on Windows 7 – no luck, same message
Tried to restore it on MacBook – NO LUCK, SAME MESSAGE
Tried to use recovery fix option on redsn0w. Did not help. I tried different versions of this program with no success. Maximum what I had is my iPad was entering “white apple mode” after clicking fix restore button.
Tried to restore iPad from DFU mode both on Windows XP and Windows 7, no luck, same message (error -1)
I suspect that my iPad may have a hardware issue however I still hope it can be fixed with your help.
We don’t have an official apple support centers where I leave and I would like to try all the options before I send it to abroad apple support center or to a shop where I bought it.
Please can anybody help me with advice on how to fix my iPad?
Thank you all in advance.

I am facing the same issue, have you had luck getting it solved?

TS3694 i keep getting unknown error code 1, when trying to restore my i phone 4s. it has just been fixed by the insurance firm

help

https://discussions.apple.com/message/23298645#23298645
more
https://www.google.dk/search?q=iphone+restore+error+1&oq=iphone+restore+error+1& aqs=chrome..69i57j0l5.6429j0j7&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8

My iphone says an unknown error occurred (9) when trying to restore in iphone recovery mode

my iphone says an unknown error occurred (9) when trying to restore in iphone recovery mode

Hey there ejs11201,
I see that you are getting an error code when attempting to restore your iPhone. Here is an article that addresses that specific code with some troubleshooting steps and will help you resolve the issue:
Check your security software
Related errors: 2, 4, 6, 9, 1611, 9006. Sometimes security software can stop your device from communicating with either the Apple update server or with your device.
Check your security software and settings to make sure that they aren't blocking a connection to the Apple servers.
Get help with iOS update and restore errors - Apple Support
https://support.apple.com/en-gb/TS3694
Thanks for coming to the Apple Support Communities!
Regards,
Braden

Ipod touch 2nd generation getting unknown error -1 message while trying to update to 4.2 disabled the security still get message any suggestions?

While trying to update my ipod touch 2nd generation to ios 4.2 i get the messge this ipod could not be restored. Unknown error occured (-1). Tried updating with security software disabled, restarting both computer and ipod still same results any suggestions?

Since Apple says:
Error 1 or -1
This may indicate a hardware issue with your device. Follow Troubleshooting security software issues, and restore your device on a different known-good computer. If the errors persist on another computer, the device may need service.
It sounds like you have a hardware problem ((device may need service). Make an appointment at the Genius Bar of an Apple store.
Apple Retail Store - Genius Bar

I'm trying to export a pages document to word, on a mac and keep getting "unknown error occurred" anyone else seen this

Have created a document in Pages and am trying to export to Word, when I do this I get the message "an unknown error occurred" anyone got a solution to this?

This is an old thread, so you have probably given up, but the problem is relatively easily solved. The issue is apparently bad or corrup, or missing fonts.
You can try to chase that down, but it is faster to simply try deleting half the document and exporting again. If that works, restore the deltion and delete half of that section. Keep doing this systematically until you have located the part of the document causing the problem. Often it is something pasted in from another document.
You can then export most of the document and then copy and paste the remaining bits over into Word.
This works with Keynote, too, where often the issue is just one slide.
Good luck!

Getting "An unknown error occurred (502)" while trying to download a TV episode under a season pass

Any ideas on how to resolve the following error:
There was a problem downloading “The Bear and the Maiden Fair / Game of Thrones / Game of Thrones”. An unknown error occurred (502).
Please check that the connection to the network is active and try again.
This happens on both iMac and PC, but I can still download other purchases at the same time.
I have been able to download some of the episodes, but seem to get the problem with the new one every week.
iTunes support have fobbed me off, so any suggestions are welcome ...

Fingers crossed. But if you still run into trouble, perhaps try the "Error -50," "-5000," "8003," "8008," or "-42023" section in the Specific Conditions and Alert Messages: (Mac OS X / Windows) section of the following document:
iTunes: Advanced iTunes Store troubleshooting

An unknown error occured [13] when trying to restore iphone. Help!!

When trying to upgrade to the 2.0 upgrade my phone said I had to restore it to its original settings. Then I get an error stating " The iphone could not be restored. An unknown error occured [13]. Any suggestions?

I get no error message, it just sits on restore for an eternity.

TS3694 I keep getting this error message 3194 when trying to restore my ipod. Pass code has me locked out and am trying to restore

I am locked out by the pass code and am trying to restore, I keep getting this error message 3194 . PLEASE ADVISE !!!

See:
iOS: Restore error 3194 or 'This device isn't eligible for the requested build'
How to Fix iTunes Error 3194?
Fix Error 3194 from iTunes during iPhone restore

When trying to download from iTunes, I keep getting the "error 8003" message, while trying to download. What does it mean? What should I do? Help!

I keep getting the message "error 8003", while trying to download a pre-purshased TV show from iTunes. What does it mean? What should I do?
Help!

Have you tried exiting iTunes and restarting? The times I've seen this error this has worked. After restarting iTunes the program asks me to sign into my account and then the downloads begin.

HT5085 Trying to log into my iTunes account and keep getting "unknown error occurred (-50)

I am trying to log into itunes and everything I get this message, what do I do?

Error 13, 14, 35 and 50 (or -50)
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 Dock Connector or Lightning Connector to USB 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. An incorrectly set default packet size can cause this error. Contact the software manufacturer that installed the packet-size modification for assistance. Or, follow this article by Microsoft to reset the packet size back to the default for Windows:How to reset Internet Protocol (TCP/IP).
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.
iTunes: Specific update-and-restore error messages and advanced troubleshooting

I keep getting an error file security while trying to update to 10.5

The error is:
update 2.1.2 120\getlasterror5
Any idea what this error is and why I cannot update to 10.5 on itunes? Im trying to update my iphone 3GS to ios5. My husband was able to update my phone through his computer last nite but now I cannot get my apps back from my itunes acct because it will not update to the latest software. Itunes is not even recognizing my iphone when I connect it to my computer.
Please help!! Need my apps!!

WHAT OS? What security suite?
I doubt that is the problem (it might) it could be something like your PC BIOS.
You both use the same security software? No?
Same router? so rule that out.
The fastest way, believe me, had "h.... on wheels" with trying on different computers, just setup a 2nd Windows install / backup what you have / setup a new partition if you can, you may just have some under-the-hood issue harder to find pea under mattress / needle in haystack - be creative.
Do a Windows Easy Transfer, always good to have, you may want ot migrate files back later to the new system.
Future iOS updates won't be this involved or difficult.
Some with 3GB though find that they lack the processing power and RAM to really enjoy or appreciate (or like!) the new iOS 5. It seems fine on Touch 4G but I wish I had at least double the RAM it has, and wish there was a new dual-core + graphics along with 512MB or more RAM.
itunes Troubleshooting security software issues
iOS 4 Understanding multitasking
iTunes: Backing up, updating, and restoring iOS so...

Trying to convert a word file to pdf and keep getting "An error occured while signing in"?

Trying to convert a word file to pdf and keep getting "An error occured while signing in"?

Or contact Adobe Customer Service via http://helpx.adobe.com/contact.html?product=export-pdf

I keep getting "Unknown error occurred 21" while trying to restore

Similar Messages

Maybe you are looking for