TS3682 Iphone cannot sync and is not recognised by computer or itunes

Iphone continually displays the symbol to connect with itunes when pluged into to a source of electricity... but Itunes doesn't recognise it and i cannot get it to sync.
I have downloaded the newest version of itunes and updated my computer but still cannot sync.
Itunes seems to realise something is connected as....
'Itunes could not contact the Iphone software update server as you are not connected to the internet.'
...shows up in itunes everytime i reconnect the iphone with my laptop. I am however connected to the internet.
Please help! :S

In iTunes,go to Help > Diagnostics.
Run tests
If the issue is device not found go to http://support.apple.com/kb/TS1363?viewlocale=en_US
I ran through process to update drivers now phone is charging and recognised by my computer.
Also if need be go to http://support.apple.com/kb/TS1567

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It has always been very basic to always maintain a backup copy of your computer for just such an occasion.
Use your backup copy of your computer to put everything on the new one.
It sounds like you have failed to do this, which is not good at all.
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About iTunes Store authorization and deauthorization
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Enter one unique contact and calendar entry on your computer.
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You can check your warranty status here:
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TS3682 Iphone cannot sync and is not recognised by computer or itunes

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