ITunes could not back up,an error occurred, could not sync app.

First, when I connected iPad to pc, a window pop up and asked, select the program to launch for this action: Microsoft Office OneNote, or Microsoft Office Word, or Microsoft Scanner and Camera Wizard. normally I didnt choose and just closed the window. Is that right?
Normally my iTunes will aotomatic sync, but now soon it will pop up a window,: iTunes could not back up the iPad because an error occurred.
After this, I found could noy sync my downloaded app to iPad.
How to overcome this? Please help me, thank you.

spent the morning on the phone with apple... they are, or were, unaware of the problem with ipad not syncing with itunes... i suggested they go on line and see the hundreds of comments there and come to their own community to see all the comments here...
they had me completely remove itunes from my computer (a mac) and reinstall... still no sync... they then had me do a hard restore on my ipad... it worked... and it is done without the computer initially... still have to plug in but to prepare it for the hard restore... i didnt... contact the tech dept... they now know what is going on...

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When I execute my download for Itunes windows comes back with the error file does not exist verify it

The following error message comes up every time I run the Itunes installer package.
"This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid windows installer package."
I've tried several downloads, but they all end with the same error message.
I also resently had my hard drive cleared due to a virus, so possibly missing something?
Vincent

Hi vindog60,
Thank you for using Apple Support Communities.
To troubleshoot this issue where you get an installation error with iTunes on your Windows PC, please follow the steps in the article linked to below.
Issues installing iTunes for Windows - Apple Support
Cheers,
Alex H.

With this computer I am unable to purchase anything at the iTunes store. The message is: We could not complete your iTunes store request. An unknown error occurred (-1202). There was an error in the iTunes store. please try again later.

I am unable to purchase anything at the iTunes store with this computer. The message is:
"We could not complete your iTunes store request. An unknown error occurred (-1202).
There was an error in the iTunes store. please try again later."
I always need to go back to my older laptop to purchase anything.
Can anyone help?

I get the error
we could not complete your itunes store request unknown error occurred 50
I use Win 7 ultimate with a fresh install of itunes. My Win 7 has never had a installation of itunes before.
I have tried disabling my firewall, but nothing changes.

"We could not complete your iTunes Store request. An unknown error occured (-1202) - FRUSTRATED

Hi,
I had been using iTunes version 10.7 till i started getting the error "We could not complete your iTunes Store request. An unknown error occured (-1202). I tried to troubleshoot it but didnt work, therefore i upgraded to the latest iTunes version 11, and this didnt solve the problem either. Now i have reverted back to the older version of 10.7, have even restored my system to some earlier date when everything was working but issue still exists. I have noticed many people have also experienced this issue but most of them faced this with the latest version of iTunes 11. Please suggest - i am frustrated now and have almost given up.
Thanks
Hassaan

I have the same problem PLUS I get the "Genius is temporarily unable to show you related music..." whenever I select a song. This occurs even when I log in as Administrator. Updating to 8.0.1 did not fix either problem.
I can access the iTunes Store and download music. Genius had no problems uploading my iTunes Library info, and it can create playlists for selected songs. I believe this rules out communications and authorization problems. I have a G4 Mac Mini, a G5 PowerPC, and an Intel iMac with the same problem, so it's unlikely to be a Mac hardware issue. A firewall problem was unlikely (since I can access the iTunes Store), but I tested this with the firewall off. Both problems still remained. Updating Genius, turning Genius off and then on again, reinstalling iTunes 8, updating to 10.5.5, etc. did not work.
The only unusual factor is that I have HughesNet satellite 'broadband.' I cannot see how that would matter, but perhaps the individual song iTunes Store and Genius features don't get along with something in my HughesNet 'modem.' Any ideas from other users?

TS2753 we could not complete your iTunes store request. An unknown error occurred (4200)

When I sync the iphone 4s after updating the apps on the download section, I get the error code : we could not complete your iTunes store request. An unknown error occurred (4200).
iTunes updates the phone as far as I know, but clearly there is some sort of error or fault. I have looked for code elsewhere and googled it too without success.
Anyone else come across the same problem?
Thanks

It was just an outage for the store. Happened earlier today and was back up and working within 10 minutes.

We could not complete your iTunes store request! And unknown error occurred! (12002)

Hello everybody!
I finally installed Mac OS X Lion on my MacBook Pro yesterday and I bought it from Mac's App Store! However I went to iTunes stroe using my Lion Operating System and I downloaded the new Cut the Rope: Experiments and my account was working fine in the beginning of the day! Then I realised that I wanna changed my accounts e-mail adress and this is not my main e-mail adress! So I changed it and after that I am not able to sign in to iTunes Store from my Mac OR FaceTime! BTW FaceTime was working fine as well! I tried creating new Apple ID's but even they didn't work for me! I received the error "We could not complete your iTunes store request! And unknown error occurred! (12002)"!
I tried signing in with my friends MacBook Pro with a different IP and he we received the same error again! I can sign in to apple.com through Safari and I can sign in with my iPod Touch! What should I do ??! Any soloutions ?!?!
Peace
Romin

Got it. I realized that I am logged in under my old log-in name (email) on my iPad. After I signed out and logged in back under my new log-in name (email) on iPad, it went through on my Mac as well. Check if you are not logged in to iTunes under the old ID on another device.
MH

TS1424 I get "We could not complete your iTunes Store request. An unknown error occurred (4002) Can any person help me with this on, please?

I get "We could not complete your iTunes Store request. An unknown error occurred (4002) Can any person help me with this on, please?

Turning off iTunes Match and Genius and then turning them back on appears to have worked for some people e.g.
https://discussions.apple.com/message/22059685#22059685
https://discussions.apple.com/message/18427550#18427550

I continue to receive message that "We could not complete your iTunes Store request. An unknown error occurred (4002). Please try again later." This has been happening every time iTunes Match runs in background. Any suggestions for a cure?

I continue to receive message that "We could not complete your iTunes Store request. An unknown error occurred (4002). Please try again later." This has been happening every time iTunes Match runs in background. Any suggestions for a cure?

Found a potential solution here:
https://discussions.apple.com/thread/4332757
Gsleeroy
Re: error 4002 in itunes match do you have a solution?
Sep 23, 2012 10:08 AM (in response to matracaelcan)
Hi All,
I had this problem today myself, and was frustrated repeatedly by the '4002' error.
I have literally just fixed the issue by doing the following steps:
1: Go to the 'Store' tab and select 'Turn Off iTunes Match'
2: Return to the 'Store' tab and select 'Update Genius'
3: Wait for this to complete succesfully, the return to the 'Store' tab once more and select 'Turn On iTunes Match'.
4: iTunes Match will now go through the motions and should succeed!
I hope this helps

ITunes Store error msg: We could not complete your iTunes Store request. An unknown error occurred (-50).

So I began having trouble connecting to the iTunes store with my computer about a month ago. It was working fine, I purchased and downloaded some music, and then the next day I got this message when I clicked on the iTunes Store: "We could not complete your iTunes Store request. An unknown error occurred (-50). There was an error in the iTunes Store. Please try again later."
Some basic facts about my computer:
Mac OS X 10.7.3, purchased in May '12.
iTunes is updated to the latest 10.6.3 version.
I have Sophos Anti-Virus (newly installed in the last two weeks).
No firewalls are set up.
Parental controls are not blocking anything (don't have them set up).
Internet connection is fine, no matter how I connect.
I did have an older version of iTunes (the previous version, so it wasn't that old) when the problem began, so I updated to the newest version hoping it would fix it; but it hasn't. I have checked the firewalls per apple community posts. I have checked the network connection. I only just put on an Anti-Virus (and the problem was pre-AV, so it shouldn't be that). I FINALLY figured out how to uninstall iTunes, and then I reinstalled it. The store still won't open, giving me the same message.
A little more research seems to show that the (-50) error is when it times out? But the message appears barely half a second after I click on the iTunes Store icon. It doesn't seem to even try; there isn't enough time to warrant a 'timing out'.
I am at a loss. At this point I am considering taking my computer in and telling them 'fix it, no matter what', but if I can avoid the hassle of being without my one and only computer for at LEAST a week, that would be great.
Does anyone have any ideas?!
Thank you and God bless!
Mary

Hi Laura-Wedders,
Thanks for visiting Apple Support Communities.
On August 7th, some users may have been unable to make purchases from the App Store, iTunes Store, Mac App Store, or iBookstore. Apple worked quickly to resolve these issues, however you may have experienced them.
To check the current status of these systems please see:
Apple - Support - System Status
http://www.apple.com/support/systemstatus/
If you are still experiencing issues, you may want to troubleshoot with the following articles:
Can't connect to the iTunes Store
http://support.apple.com/kb/TS1368
iTunes: Advanced iTunes Store troubleshooting
http://support.apple.com/kb/TS3297
All the best,
Jeremy

When trying to sign in to the iTunes store I get the following message, "We could not complete your iTunes Store request. An unknown error occurred (5002). There was an error in the iTunes store. Please try again later." How do you resolve this?

When trying to sign in to the iTunes store I get the following message, "We could not complete your iTunes Store request. An unknown error occurred (5002). There was an error in the iTunes store. Please try again later." How do you resolve this? Has been going on for days now.

I started getting this message a couple of days ago.
Started a thread of my own before I saw your post. https://discussions.apple.com/thread/4660828

Since updating to the new iTunes, I have been getting this error message while trying to sign in to iTunes. "We could not complete your iTunes store request. An unknown error occurred (-50)." HELP PLEASE

Is anyone else receiving this error message, "We could not complete your iTunes store request. An unknown error occurred (-50)."? Please Help

Try Here > http://support.apple.com/kb/TS1583
And See this Discussion...
https://discussions.apple.com/thread/4204776?start=0&tstart=0

TS1717 Hi, my iTunes application is not connecting to the iTunes store. It is coming up with the following error message "we could not complete your itune store request. An unknown error occured (11222)" Can you please assist?

Hi, my iTunes application is not connecting to the iTunes store. It is coming up with the following error message "we could not complete your itune store request. An unknown error occured (11222)" Can you please assist?

Hi Laura-Wedders,
Thanks for visiting Apple Support Communities.
On August 7th, some users may have been unable to make purchases from the App Store, iTunes Store, Mac App Store, or iBookstore. Apple worked quickly to resolve these issues, however you may have experienced them.
To check the current status of these systems please see:
Apple - Support - System Status
http://www.apple.com/support/systemstatus/
If you are still experiencing issues, you may want to troubleshoot with the following articles:
Can't connect to the iTunes Store
http://support.apple.com/kb/TS1368
iTunes: Advanced iTunes Store troubleshooting
http://support.apple.com/kb/TS3297
All the best,
Jeremy

HT204406 iTunes Match ISSUE: we could not complete your itunes store request. an unknown error occured (-50)

I cannot turn on my iTunes Match. When I try to add my computer it just says:
"we could not complete your itunes store request. an unknown error occured (-50)"
and then I press ok and it says:
"We could not complete your iTunes Store request. The network connection could not be established"

Apple appears to be having trouble with the iTunes Store servers right now. Wait for them to fix it.
(81069)

When I attempt to purchase a song from itunes, I keep getting the following error message: Could not purchase "song name". An unknown error occurred (-42408). There was an error in the itunes store. Please try again later

When I attempt to purchase a song from itunes, I keep getting the following error message: Could not purchase "song name". An unknown error occurred (-42408). There was an error in the itunes store. Please try again later
Can anyone help solve this problem?

I've done a search on here and haven't found any solutions posted for it for windows computers. You could try posting in the iTunes For Windows forum and see if you get any suggestions in there (are you able to download other items from the store e.g. a free app ?) - I use a Mac, the only things that I could think of to suggest trying is see if you get the same error on a different iTunes library :
creating and/or opening a different iTunes library : http://support.apple.com/kb/HT1589
or using a different user account on your computer in case it's a problem with that user account.
But you may want to try the iTunes For Windows forum first, apart from anything else you are likely to get better help for the above

Every time I launch iTunes I get message "We could not complete your iTunes Store request. An unknown error occurred (4002)." Anyone know what this is?

Hi everyone. Every time I launch iTunes I get a message "We could not complete your iTunes Store request. An unknown error occurred (4002)." Anyone know what this is or what I need to do to stop it? Any suggestions much appreciated.
Geoffrey

Re: An unknown error occurred (4002).
This might solve your problem....

ITunes could not back up,an error occurred, could not sync app.

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