Open Up Your NWN Directory
*Right-Click On Your NWN Shortcut, Properties, Find Target (Win Xp)
*Right-Click On Your NWN Shortcut, Properties, Open File Location (Win Vista / Win 7)
Open The File Called, Nwnplayer.ini
*Open The File Using Wordpad, Notepad Or Something Similar.
Under [Game Options] Locate. Client CPU Affinity=
*To Easily Find It Use Your Search Function, Normally Set As Ctrl+F
Edit Client CPU Affinity=
*Change The Value To Either Be 0 Or 1
*Should Look Like This: Client CPU Affinity=0
*Should Look Like This: Client CPU Affinity=1
*Save Changes Then Check Your Game