This atom dual-system machine, starting from the Z37 series, has the problem of TF card. Either Win system does not recognize TF card after system switching, or Windows system uses high-speed TF card driver after a period of time. If the second case is, you can try to install the old TF card driver.(https://drive.google.com/open?id=1kC5Ldccw9zf2mEsUq9esczE2IVIzR_yp ,this driver for tf card is for win8 ,some person use it can resolve the second problem)