iTunes was unable to load provider data from Sync Services.

Hey I am trying to do ur solution and maybe im just to dumb when it comes to computers lol but when I put the format into the bar when I pull up my computer nothing pulls up for me. I have windows 7 so I did that one. If u could help me out I would appreciate it.

thanks to LADY and TRUTH i did both just incase. ive been deal with this for probly a month thanks again!

I swear, you are an angel! thank you so much 🙂

I've been having the same sync service error for three weeks now, ever since i updated to the newest iphone os, and itunes version. I've rolled both back, and done everything in this thread to troubleshoot, yet nothing works. My ipod still works and syncs fine, it's just my phone, I don't have the option to restore from a backup or anything. I tried to use windows system restore, but for some reason all my restore points are gone. I leave for deployment in 2 weeks and was trying to fix my phone before I leave. Should I just scrap it and get a different phone when i get back?

I finally got rid of the error message by deleting the backup folder. Thanks
iphone is backing up now. How may hours should a backup take?

I created an account just to say thx u Ladykj your solution was right on no more annoying error message....

I am sorry to belabour on this issue:
I have tried the deletion of backup files and copying the two files (libxml2.dll and libtidy.dll) into mobile device support folder as mentioned but still no luck.... same error "itune was unable to load data from sync services" any other clues?
Thanks so much!!! I am going crazy... it's been dragging on for weeks.... very annoying!!!

I have tried, deleting back-up files an moving the two files but still get the same message!
This is reli annoying
Any help???

Hallo, i have the same problem,
iPhone 3Gs
iTunes 9.1,
With Windows XT no problem, With Windows / 64bit, nothing to do.
Thank you for help me...

I ended up calling Apple & found the tech support extremely courteous & helpful. Don't need to delete anything, but do need to copy over files that they can walk you through. Call away guys if you still need help...

Just tried your fix on my XP Pro Itunes running PC and it worked perfectly!!! (I have a pre-G Iphone) Thanks soooo much for posting this fix. Geeze though such a dumb/simple mistake leaving out those critical files, What Is Up With That ?? You'd think the Apple Peeps would've released another update immediately to correct the faulty on or at least made the fix easier to come by. At any rate much thanks again to all here that contributed to getting the fix posted here.

A client had the same problem with his windows 7 x64 laptop and iPhone 3G. I uninstalled everything from Apple, reinstalled iTunes 9.0.1 x64 (older version) and it works again.

Yet another bug with iTunes+QT... :P

i downloaded iTunes 9.1 for Windows 64bit.

Any better luck with the new iTunes version 9.1.1.11 (just released today), mert? It includes an update to AMDS and the Apple Mobile Device Service, so fingers crossed it may be of some assistance with your issue.

Spent hourse trying to sort the problem out Thanks for the info much appreciated
JamieJay

Thanks. That solution worked for me. I tried alot of things. This was the only thing that worked for me.