You can try to enter the Setup Bios Program Utility, pressing SUPR at boot. Next, you should disable the Card Reader, USB slots, etc. Install Windows as normal and the main partition should be C: After that, you can reboot, reenter Setup Bios Program and enable Card Reader, Usb, etc. Windows detects the Card Reader, installs it automatically and assign the first available letter. PD. Sorry for my english, I'm spanish