How can I update/backup/sync my iPhone to another computer?

My desktop computer that I normally use to sync my iPhone seems to have a virus or something, because it turns off by itself after a while. It does not give me enough time in between it being on and turned off by itself, to complete syncing, backing up or updating. I want to recover my computer therefore losing everything.

What can I do to start hooking up my iphone without losing my apps and settings? Can I move an itunes folder from my desktop to an external hard drive? I don't know what to do, thank you for any help!!!

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Thanks for your help! my problem have been solved!

I have the same question, thank you guys to share your experience.

This is great information to keep on hand.

Thank you,
bc

When I transferred it between my PC and Mac, I plug it in and right click the iPhone and "transfer from iPhone".

Another alternative which I did was plugged in an external hard drive, and manually selected all my purchases from the user\music\iTunes folder and dragged the iTunes folder with the sub info to an external drive and then select the folder again and move it from the drive to the new computer in the same location it was
(Windows: My Documents folder\music\iTunes)
(Mac: Accountname\Music\iTunes)

Note: For all purchase accounts, you need to authenticate. I have two accounts (gmail and me) which is troublesome. I have yet to find out how to change the email address properly from gmail to the me account since the account already exists.

Hello all,
Thanks a lot for the reply. You guys seems to have provided me some very useful information.

Originally Posted by appleluntanyi

Everyone who is having this problem should follow this page about iPhone Transfer Backup Reviews.
Click on the link above and follow the instructions.
Hopefully this works for all of you like it just worked for me!

have to pay for your software not?

connect your iphone with computer and open itunes, when itunes recognize your iphone, open the info tab and select to sync address book , then click “apply”. If this is your first using iphone I suggest you go to apple’s support website to learn more basic uses, if you tired of itunes you can choose other iphone transfer to do your backup. a third-party tool maybe can help u--iphone to computer transfer.just google and try it,good luck.

Everyone in this thread realy give good information which would help me a lot,whenever I would face this problem,thanks to all.

yes you can move iTunes to new computer, also move your backup. when you synch you have option of 'synch from backup' or set up as new device... Go for the restore from backup option if you can that way you keep everything including passwords ect.
backup should be here: C:\Documents and Settings\name of user\Application Data\Apple Computer\MobileSync\Backup
More Reviews:
How to transfer iPhone files/data to Computer
How to transfer contents from iPhone to Mac

nice information