How can I fix my PC when Windows 10 won’t boot?

John ran a tune-up utility and now his Windows 10 laptop won’t start. What can he do?I recently ran a free trial of a PC tune-up utility, including a disk clean-up routine, on my Windows 10 laptop. When it restarted, it reported a missing component. Said machine then bricked: boot begins, then the screen blanks.Are there any steps that I can take to recover access to the machine? Failing that, can I recover my files from the hard drive, installed in a USB cradle? JohnMicrosoft has spent a