A PunkBuster "Service Abnormality" normally means that something is interfering with communication between the client services running on your PC (PnkBstrA, PnkBstrB, PnkBstrK) and the server.
Quite often this could be antivirus, firewall or security software ... or a host of other programs ... which can have services or hooks running in the background even though switched off or disabled.
Most official advice boils down to submitting a support ticket to evenbalance (who require patience to deal with) and/or eliminating suspect services.