cannot sign in to itunes store / itunes match
got unknown error on login mask.
password is correct. on the apple web site i can sign in.
I have been getting this too! I rest my password and everything. It is working fine on my iPod and iPad but my computer won't let my sign in. Have you gotten an more info on it??
First step, is to reboot and try again, espcially since OP is using Windows.
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