Or:
Stop all the services available in your PSMServer_mgr.
Right click on your task bar.
Press "Start Task Manager".
Go under "services".
Stop these services:
shaiya_serverf
shaiya_server
MSSQLSERVER
Then you can delete your whole "SHAIYA_SERVER" folder
After you've done that, open cmd (run - cmd) and type in:
sc delete ps_gamelog
sc delete ps_game
sc delete ps_login
sc delete ps_session
sc delete ps_userlog
* sc delete psm_agentserver (if installed)
* sc delete psm_agentclient (if installed)
I don't have those 2 services installed