Well first of, it may not be called Syntek STK1160 when you get it working. It might be called "OEM device" like mine. I wanted that to get cleared up before I started :).
Tips for drivers:
When I upgraded to windows 8, the drivers I had previously for windows 7 still worked, so you probably don't need to worry about that.
Also, as there are many fake easycaps out there, not all drivers will work. what i did (when i had windows 7...might still work) is i went into the device manager section. to get this, go to the bottom left corner, right click on start and its in that menu. then find you easycap. If it does not have drivers, there will be a section called other with a small yellow caution sign next to it. otherwise, it has drivers.
Now you might have the wrong drivers. if you do, then your easycap will not be in others or its own section (sorry forget the name). delete the drivers by right clicking and there should be an option to do it. now, assuming you found drivers on the internet and there are on your pc, click update or find drivers, and it should work. If it doesn't, you either
A) have the wrong drivers or
B) have a fake easycap that doesn't work. most fakes do, but some don't