When I open the video, it will lag at the beginning of the video, only at the start of the video but audio is ok. While playing video games is also lagging, surfing are sometimes lagging. What should I do, is something wrong with my computer. Is there any software that i can use to check whether my computer is broken or not. Thank you.
My laptop spec
931GB TOSHIBA MQ02ABD100H (SATA)