Iphone ios6 update could not be updated an unknown error has occured 1602

Hello,
So I have an iphone 4s, never had any issue until I tried updating to the new ios6 and shortly while it was applying the ios6 update, it stopped and gave me this error:
could not be updated an unknown error has occured 1602.
To which my Win 7 64 pc would not see it anymore, and itunes would not see it. Went through what apple suggested removed everything and reinstalled itunes, did not work. The only way I could get my iphone working was plugging into another pc running an older version of itunes and restore it. Once done I went back to the original PC worked fine to sync, but when I tried yet again to update to IOS6 it crashed again.
I have spent way too much time on this, spent way too much money on apple products (still need to update another iphone, and ipad, an itouch and an iphone 5), I need this fixed, who can help?
Image shows what happens:

"This error is caused by attempts to downgrade the iPhone, iPad, or iPod touch's software. This can occur when you attempt to restore using an older .ipsw file. Downgrading to a previous version is not supported. To resolve this issue, attempt to restore with the latest iPhone, iPad, or iPod touch software available from Apple."
Taken directly from this article http://support.apple.com/kb/TS1275.
Plug your iPhone into iTunes and update it to the latest supported version, which is 4.2.1.
- Greg

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this i had to reinstall a few programs along the way.
Now unfortunatley itunes is not being co-operative,
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Ok..
Installing the Mac OS X 10.6.8 Update Combo may help this.
Restart your Mac after installing the combo then try downloading Lion.
It's ok to install the combo even though you are already running v10.6.8
BEFORE you do this make sure your Mac meets Lion's requirements:
Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
2GB of memory
OSX v10.6.6 or later (V10.6.8 recommended)
7GB of available spare
From here > Apple - OS X Lion - Technical specifications
Read this article before upgrading to Lion > Lion upgrade questions: Apple Support Communities
And here > What applications are not compatible with Mac OS X 10.7 "Lion"? What upgrade or substitute options are available for common incompatible applications? @ EveryMac.com

Iphone ios6 update could not be updated an unknown error has occured 1602

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