The issue is not clear, please clarify this are you getting black screen, blue screen or some thing else ?
I am having Windows 8.1 pre-loaded (W-8 upgraded to W-8.1) in a Lenovo laptop. I reserved for Windows 10 and it was also acknowledged. After waiting for 2 months for the upgrade advice from Microsoft and losing patience I tried to upgrade myself using "Microsoft Media Creation Tool" (Upgrade this system option). Every thing went on smoothly, The OS was downloaded and the License screen appeared. Here the installation halted and did not proceed further. The License screen stayed minimized and could not be enlarged to display the "Accept" button. I will appreciate very much help to proceed further.

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