There's a New issue Messing with Windows live IDs and there association with paid accounts this bug affecting Xbox Live sign in, the msn shopping site, Windows new activation. Now it appears to be messing with Windows live One Care Activation.
I say give it a few hours the issue intermitten it comes and goes.
things to check: credit card in check current ?
Can you sign into Microsoft billing ?
http://billing.microsoft.com
try going to http://account.live.com change your password save it
go back sign in under new password if it signs in. Try the activation under new Windows live ID Password you just set
that still don't work try cleaning the internet options delete all you might have some burn't cookies and temp files in there messin with ya.
There's also the chance the under the Windows Account manager under manage online passwords on the left the Windows live ID file might be fragged I get this all the time you clear that. and with the internet optiions temp files and history cleared. then try that activation Windows Live One Care will set a fresh file then when you try and activated elimnating all conflicts One Care should activate.
Reading the 25 digit Key tip: I plop that sicker or the entire case in a flatbed scanner scan a bmp of it and save it then zoom in on the bmp to verify O is O and not Q D is D and Not B or 8 or O the printing machine that prints those keys needs to be improved ink runs on the stickers making those letters really hard to read.
Keys are entered using all caps
