Safely Remove Memory Cards without Using 'Safely Remove Hardware'
Reader Dane wrote in seeking help with this hassle: "After using Safely Remove Hardware for my SD card, I have to reboot my PC before my PC will recognize another SD card. Is there a way for the PC to accept the card without rebooting?"
This brings to mind the old joke where the guy goes to a doctor and says, "It hurts when I do this," and the doctor says, "So stop doing it."
Dane has the best of intentions: Windows' Safely Remove Hardware (SRH) option stops all read/write activity on a removable drive, thus preventing any data damage when the drive is unplugged.
But note the key word here: drive. When you use SRH on a memory card, you're actually "safely removing" the card reader. That's why Windows refuses to recognize subsequent cards until you reboot (at which point the reader gets re-detected by the system).
......

: