1) Check to make sure your pc is using the gtx1060 instead of the intel graphics. Make sure the video cable is plugged into the correct port (happens often to people). It should be plugged into the ports on graphics card itself, should be the ones near the bottom of the case. If youre sure its plugged into the gpu, check to make sure in your graphic control panel, its set up to use the nvidia gpu instead of the intel gpu.
2) Check video driver. Make sure its installed. If it is, make sure its either the latest one, or if it is the latest one, try using an older one to see if its a problem with the newest driver. (also try both beta and non-beta drivers)
3) Check to make sure your PC is set to "high performance" under the power options in control panel.
4) Check the temperature of the cpu and gpu while playing games. You can use something like MSI afterburner. It tells you all the data about your cpu and gpu. Another thing to check the the clock speeds of the cpu and gpu. Sometimes they throttle to very low clock speeds to save power or because they are overheating. If it is overheating, try cleaning your pc or check the thermal compound and heatink assembly on cpu/gpu and/or your cases cooling.
5) see if parts are defective or if there is an issue with your windows operating system. Try swapping in/out hardware with different hardware or transfer your hardware to another pc to see if the problem persists. Try running a "sfc /scannow" command in command prompt and/or reinstalling windows all together.