This is some sort of anticheating software that you can’t really remove called Punkbuster
Removing Punkbuster « Bucking the Trend
For those who want to really uninstall Punkbuster, the file PnkbstrA.exe is located in the Windows\System32 folder in Windows XP. Before deleting it, go to Start Menu -> Run -> type msconfig, then look at the [...]
Punkbuster is hard to remove
June 18th, 2008 · 2 Comments · Geek
Tags: Exe·Hacking·Index Php·Msconfig·Online Servers·Punkbuster·Punkbuster Online Countermeasures·Service Components·Start Menu·Trend·Uninstall·Uninstall Program·Windows Xp