Steam - COD4 PunkBuster Error?

[izzop]

Hi,

I've just used Steam for the first time and purchased COD4 Modern Warfare.

When I switch to Multiplayer I get the following error: -

Unable to initialize PunkBuster. PunkBuster is disabled.​

Has anyone got any ideas how I can get this error fixed and PunkBuster enabled?

Many Thanks

 

[izzop]

The latest PBSetup, Secuirty Files or Client Files?

Also, where is the PB folder on my PC, have had a look and can't find it?

Running Win 7 Pro 64bit, if that makes any difference.

Regards

 

[izzop]

this, and last time i played cod4 on steam i had to disable the steam overlay to get on a server without being kicked

This is a rather lame question but, 'Steam Overlay'? Where is this done?