Disallowed Program/Driver [80251]

[Cassius]

Recently I get kicked every time with the above error message from any server. I tried reinstalling BF2 and PR, but nothing.

I recently installed Desura, Dropbox and MSN. Could any of those harbor the disallowed program?

[Psyrus]

I recently installed Desura, Dropbox and MSN. Could any of those harbor the disallowed program?

Kill their processes before running PR, and find out

Someone going on about a rootkit issue, but not sure.

[LITOralis.nMd]

That is also a error code if you have an disallowed overlay program running in the background.

[ZalkotaUSN]

I believe your problem is the steam overlay, if you do have that running in the background (Shft+tab when in game) turn it off and your problem should be fixed! If not sorry.

[A.Finest]

Steam In-Game is one thing that could kick you, another thing could (rarely but the Xfire Overlay).

And last Teamspeak 3 Overlay, some people accidentally activate it during the Teamspeak 3 Installation.

If you dont have any of these installed/running while ingame then ofc you're sure this is not your source

[Cassius]

Could a virus or a trojan be the reaon?

[LITOralis.nMd]

It is possible if you have some sort of screen grab trojan running in background, but that would be a rare thing, this is almost always caused by a disallowed overlay program running.

Overwolf overlay,
TS3 overlay,
Ventrilo overlay,
Asus AI Suite overlay,
MSI afterburner overlay,
Skype overlay,
PlayClaw overlay,
etc.