You should make sure it's a link and not a copied launcher that you have on the desktop. Launcher should stay in PSOBB directory along with all the other game files.
Figured that part out... there wasn't a psobb.exe file in the Ephinea full download?? Ended up downloading the full Teth client and then patching over the correct exe.
If this is due to your anti-virus, then I'd imagine that your anti-virus is one of these
AVG
Avast
BKav
Or if you're struggling to open the first EXE before the update when you join the server then it could also be
Avira
Adding an exception may fix the problem, running in compatability modes for windows xp may also help.
There was an EXE in the Ephinea download and thats the particular exe that you require.
Hey I got a problem.
So I just got a new pc and I wanted to play PSO.
I did everything like last time, but this time it doesn't work.
I run the online.exe as admin and then click on start game.
The gamewindow pops up for like a quater of a second and then closes instantly.
My Firewall or antivirus programm isn't troubleshooting at all.
No warning or problem with that as far as I can see.
I need help, because I want to play again :/