PCI\VEN_10EC&DEV_5209 Driver (Realtek Card Reader) — Download

A device with the ID PCI\VEN_10EC&DEV_5209&SUBSYS_90AD104D&REV_01.
If you’re looking for its driver, you’re in the right place.

VEN_10EC is Realtek and DEV_5209 is the Realtek PCIe Card Reader (SD card reader controller). SUBSYS_90AD104D means it’s in a Sony VAIO laptop.

Download the driver

• 0002-RtsXStor_6.3.370.71 — Realtek card reader driver for Windows XP, Vista, 7, 8 and 8.1. Downloaded from the official site and tested.
• Newer versions are on the Realtek site (realtek.com, Computer Peripheral ICs → Card Reader) or your laptop maker’s support page.

On Windows 10 and 11 the Realtek card reader driver usually installs automatically through Windows Update.

Install the usual way: unzip and run setup, or in Device Manager choose Update driver and point it to the unpacked folder.