Get your hardware ban away.

1) Install A New Copy of Windows
2) Download MacMake Up (look Google)
3) Spoof You PC whit it
4) Shut Down Your PC Unplug You network card and plug it in in another port\
5) Unplug You Had Drive and unplug it and reset it
6) Start PC
7) Go In Bios Change CD Rom to anyother // HDD1 HDD2 HDD3 , DVD , RAID , Any
8) And play on

Or go and buy PunkBuster Nuggets 30 USD
Or go and buy PunkBuster DownForce Pro 25 USD
Or go and buy ForceBuster For 40 USD

All will get you 100% UnBaned
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i didnt made this tut by maself.
so no credits for me.
dunt know the author anymore sorry

i also found an easier way.
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The guide
Use A Mac Address Change and change your mac address. Turn off your computer. Unplug your modem if you have one. Wait 30 seconds. Plug it back in and then boot your computer back up. Make a new e-mail and register a new account with the new e-mail.

Usefull Links
http://www.tech-faq.com/change-mac-address.shtml