Client lagging / freezing when I alt + tab.

[Paradox.]

I'm having an issue w/ my RO client ( private server) lagging + freezing when I alt + tab. I was not having this problem yesterday. I have not made any changes to my RO lately. I have tried re-installing the private server I'm playing at but it hasn't fixed anything. :C  When I am in-game and I alt+ tab, my client freezes and I get disconnected. When open the client, It freezes ( not responding) / white screen.
Help? Thanks.

[yC]

Hard to say, it could be a lot of things.  Do you know the client exe of the server have any security measure implemented into it (i.e. Harmony or whatever they call them)?

ctrl+alt+del to see what process is running at the same time that might be bothering the RO process.  I have seen my Microsoft security essential keep on scanning my RO process until I put the process in the exclude list.  Could happen to other scanning program too.

[Triper]

OS being used? Some OS have problems with some client versions. Are you using mouse freedom?

[Paradox.]

Problem solved. Never mind. x_x
Please close.