Download VCDS 16.8 from official sources, such as the official Ross-Tech website:
Symptoms: VCDS 16.8 crashes immediately on launch with a Visual Basic runtime error.
The Fix (COMCTL32.OCX Registration):
VCDS 16.8 relies on older VB6 components. Windows 10/11 often deregisters these.
Many file-hosting sites offer broken or incomplete versions of VCDS 16.8.