Sounds like a win10 problem. EZcap is seen as SMI device in Win7. Try plugging/unplugging EZcap and see what cameras come and go in SharpCap to make sure you are selecting EZcap. I'm not sure EZcap will work with win10. You may want to start a new topic asking about that.
The CD I received was cracked but I didn't ask for a new one anyway because I don't have a disc drive. Is EZCap even necessary?
EZcap won't work without driver on CD. Call Mike at OCT and ask for a new CD, and ask if it will work with Win10. I have successfully loaded EZcap drivers by copying CD to a 8gig USB stick and using stick to install drivers.
It is not solely a win 10 problem. I had similar issues with win 7. Initially I had nothing but a blank (dark) screen - i seem to recall that I made sure that the settings on the right side of the SharpCap frame were set correctly ( proper color space and frame size - which is yubu or whatever that color is and 7xx by 5xx for PAL), and then I toggled back and forth between one of the simulator cameras and the OEM device, and something came to life.
Unfortunately, it never could save an avi or properly stack and save a jpeg.
I had an email exchange with Robin of SC, and he ultimately concluded that ..
"I'm beginning to suspect that the drivers for the capture device are the underlying problem here - the driver quality on these devices seems to vary between just about OK and downright awful and I have a horrible feeling you might have got one of the awful ones. As I mentioned, I have a couple of capture devices now, although I can only get one to work with Windows 10 now. They both have individual quirks and I had to fix SharpCap to work around them."
I recall that i tried some other drivers to no avail.
I never loaded - or tried the - the Ulead software that came with the device. Maybe that unlocks some magic key ?
Eventually, I was so frustrated trying to make a free piece of gear work that I bought another device. Amazon was quoting 4 to 6 week delivery for the "real" easycap from Scotland (but the Scotsmen said 10 working days). So I went for another, more expensive one that a CN'er recommended - Dazzle dvd recorder from Pinnacle systems. About $50 from Amazon. I had experienced much more than $50 of frustration.
The dazzle works.
IMHO, I wouldn't beat your head against the wall trying to make the freebie work.