Alt + Tab is a great shortcut for quickly switching between applications. While it works fine most of the time, it can sometimes result in a black screen.
Windows 10 has proven to be a reliable operating system, but like other versions, users may face many problems while using Windows 10. One of the “worst” problems that users often encounter is the black screen error.
You install pirated Windows and after a few months, the screen becomes black and the words This copy of windows is not genuine inform your operating system that is not the copyrighted Windows. This is an easy fix without downloading the software.