When you plug an RTL8188CU adapter into a modern 64-bit Windows 10 PC (version 1809 or newer), you may see one of these errors:
The root cause: After Windows 10 version 1607, Microsoft began strictly enforcing SHA-2 driver signing. The old Realtek drivers used SHA-1 certificates (expired or untrusted). On a clean 64-bit installation with Secure Boot enabled, Windows 10 will refuse to load the driver. When you plug an RTL8188CU adapter into a
If you cannot find any working driver, use the Microsoft Update Catalog: The root cause: After Windows 10 version 1607,
Warning: Avoid generic “driver updater” software. Most are adware or provide unsigned drivers that break your system. Click OK
Windows 10 often auto-installs a generic driver that may cause disconnects or poor performance.
If you have issues:
Cause: You’re trying to install a 32-bit driver on 64-bit Windows.
Solution: Download the x64 version from Realtek.
If the setup wizard fails or hangs, do this:
