Weird screen size causing issue.

[Akashaseven]

Alright I messed around for a bit and though I have not pinpointed what is causing the problem or exactly how to avoid it / fix it this is what I did to play.

As we both mentioned above we reinstalled the game from scratch, this may or may not be necessary regardless always a good starting point.

You said you changed your screen size on your laptop and in game. I had also noticed before reading your post that my issue started when i was messing around with screen size.

You should be able to leave your laptop size however you like it.
Next open up your P99 EQ Client and click options (Before the server screen)

(I believe the problem is that you can change your screen resolution in this options menu, but it does not recognize your computers screen resolution sizes.)

Set your screen resolution here to 800x600 (Like you had mentioned above)

Now you should be able to log into a server. Once you are logged into a server go to options / display / video mode, here you should be able to set your resolution to whatever size you want in accordance with computer.

And that should do it.

(On a side note, I disabled everything in the original options menu before the server select when I first did tried this.)