I have acer e1-531 laptop. Its motherboard was dead so I got ot changed from brand. After it was changed, I switched on it, its window(window 8.1 64bit) was working but few of the drivers were not working so I reinstalled its window(window 8.1 64bit). It has intel hd grahics card inbuilt but under display adapter(in device manager) its showing 'windows basic graphic adapter'. I tried to install intel hd graphics driver 64 bit & vga intel graphics driver 64 bit but it is showing software doesnot meet minimum system requirement.