Hi "good evening",
Sorry for my english, i'm from switzerland i speak french :-)
I have the same problem with iTune and XP... My Old Device Touch G1 ios 3.1.3 crashed (an other storry)
and for this occasion I run in DFU mode the restoration with my custom ipsw from iTune interface and when time's came to reboot the device and wait the device appear connected, paf! this famous error message cited in the topic appears.
I have acces to the iTunes store via the interface iTune, I can loggin in.... (normal? reading the topic i didn't understood)
BUT the diagnostic is
Negative securised link faild...
I Pod is tetected,
Synchronisation test positive...
Not cool... one day you can do what you want with iTune,
"one day after" with the great hasard lows your very old device crashes...
Oh ! its the occasion to restore said I to myself, stupid maybe, DFU -> Restauration OK->finalisation restauration reboot iPod in iTune = The famous error message code about iTune Store. (stupid...directly a radical and for now fatal decision)
First I thought "it's my fault, I've made something very wrong with...I don't know".... (stupid... always seach about error code befor doing bad things...)
Oh it's the occasion to reinstall entierly Windaube XP Pro and all my programs... (time to waist...better than crying, a karsher execution)
This done like a new pc, and with many difficulties and spended lot of time, I retry to restaure my device... SAME ERROR. (any iTune version. I've tested)
To myself..."It wasn't my fault"... check finaly (a bit late) the Internet for this famous error message and found this topic so, by "waiting"... we can sing...
As could said/sing or scream Didier Super :
You crashed your old device Apple !
And you were no aware of a really important
and recent problem with the iTune Store Application
Eh ben t'est con !(in french) (well you're dumb!)
I really hope this "problem" will find a solution.
Bye from Swiss.