In the user guide for this device, it's clearly specified that Vivitar ViviCam S126 is supported by the Image Manager. If you can't see the device in the software, it's because it hasn't been installed properly. Although the S126 model is Plug-n-Play, certain errors might appear from time to time.
Go to Device Manager (Window s+ R + devmgmtm.msc) and check to see if there is no item with yellow or red sign. Most likely your device isn't installed properly. In the event that you find it, right click and choose Update driver. Choose Windows Update and make sure you are connected to the Internet.
After this operation, the S126 device will be available for usage directly from Computer or from the Vivitar Experience Image Manager.