Most functional drivers for devices of this class (controllers/capture cards) install a dedicated control interface:
Step 1: Identify the device correctly
Step 2: General driver search strategy
Step 3: Windows 7 considerations
If you have a backup of the driver folder from an old Windows XP computer: vgstc4000 driver windows 7
Since original manufacturer websites are defunct, you must rely on archives and generic driver packs. Scan any downloaded file with VirusTotal before installation.
Assuming a correctly signed KMDF driver for VGSTC4000: Most functional drivers for devices of this class
Post-install verification:
Run pnputil /enum-drivers and search for oem*.inf referencing VGSTC4000.