(if Windows works poorly):
Press Fn + F5 (or the display toggle key on your laptop). If that fails, go to Intel Graphics Control Panel → Display → Multiple Displays → Enable extended desktop. Pentium R Dual-core Cpu T4300 Graphics Drivers Download
As a legacy product, the T4300 and its accompanying chipsets have long since reached the end of their mainstream support lifecycle. (if Windows works poorly): Press Fn + F5