64Gb MicroSD not being read by PC Card Reader

Hi all, I have not been able to find a solution to this problem. My new PC (Dell Inspiron 3671) card reader will NOT read my Sandisk High Endurance MicroSD 64 Gb card in a Sandisk MicroSD to SD adaptor, however it will read a 32Gb MicroSD card. Strangely, the card reader WILL read an SD 64Gb, but not a MicroSD 64Gb. (Using a 64GbMicroSD > SD adaptor > USB adaptor > USB port works fine, and I tried formatting the card this way) Dell have updated the Card Reader Driver, and have said that the specs do not specify for MicroSD cards, only for SD cards. Anyone got any ideas? Thanks