Which i7? There are multiple generations of the i7.
What make and model computer?
Since you specifically mentioned Intel HD Graphics and Windows 10, you may want to look at this, as your Intel graphics may not be supported under Windows 10:
Also, does your computer have switchable graphics?
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Could you please fill out the information at the following link so we can better assist you?
Please don’t forget the SSU file the DxDiag and the DispDiag, also I will appreciate if you can attach the graphics report with the driver version that you have the issue.
You can follow the steps to get the Report for Intel® Graphics Drivers here: