Windows 10 installation problem.

[siddhiq momin]

Using Lenovo z50 laptop. Wanted to upgrade windows 8.1 pro to windows 10. Downloaded the windows 10 tool from the Microsoft website and ran it on the laptop. But at the end got a message, we couldn't install windows 10 the installation failed in the first_boot phase with an error during sysprep_specialize operation. Please tell how to resolve the problem asap.

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