My daughter brought me her laptop. She was trying to do a clean load of W10. She had been having a number of problems with the laptop on W7. She went into diskpart from a command prompt and cleaned the drive. I have inserted a USB with the W10 files, downloaded from MS. The Lenovo screen comes up. I then get an informational screen that ends with Exiting PXE rom. It then goes to a display of Boot Menu. If I select USB HDD: General USB Flash Drive, it simply goes blank and returns to the same display of Boot Menu. Help.