Activate windows 7 marketplace: Go to gethelp.live.com, windows phone 7, marketplace, contact us. Sign in using your hotmail account and ask for an activation code, you'll be asked for mobile number, first name and surname and you'll have your 25 digit code in seconds
Please download "HTC Sync" before doing this. otherwise you get usb fails. !!!RUN EVERY PROGRAM WITH ADMIN RIGHTS!!!