Punkbuster, I can't take it anymore...

Hello, I'm reaching out because I'm really fed up with not being able to play. It all started with Medal of Honor: Warfighter; when I launched a server, it would load normally, then send me straight back to the home screen with the lovely message "You have been kicked, Punkbuster may not be up to date." Installing Battlefield 3 fixed it for a while, but only for a few days. Earlier, I was in a match, I left, went to another server, entered the match normally, and after 1 minute, BF3 crashed, and the message on Battlelog said "You have been kicked by Punkbuster. Reason specified: reason." It's ridiculous to pay for games and not be able to play because of a crappy system. I don't care about MoH; I don't like that game, but Battlefield, which I just bought, is really frustrating. I've already updated everything. I even deleted the "pb" file and updated via Punkbuster; nothing works. I would really like to be able to play, so if someone can help me, I would appreciate it. Thanks in advance!