i have a lot of problems with windows 7.
always comes the massage: punkbuster kicked for service abnormality.

here are the solutions for me:
1. run the bf1942.exe with compatibility mode for XP SP3 and start the game as administrator.
2. disable all anti-vir program with task-manager or with a other way
3. disable your firewall, all 3 profile. (private, public ect.)