: USB driver incompatibility for the Siemens dongle.

:

Official support for Windows 10 (64-bit) only began with the release of WinCC flexible 2008 Service Pack 5

To understand the difficulty, we must look at the timeline. SIMATIC WinCC flexible 2008 was released long before Windows 10 existed. Service Pack 3 (SP3) was the final major update for the 2008 version, designed primarily to ensure compatibility with Windows 7 and the transition to Windows 8.