Do you want to boot from a USB stick or CD-ROM trough Windows 8/10 ? Or is Windows is not booting/working properly?
From the boot options menu, you get several options to repair your Windows installation or to boot from a bootable device.
This video shows how SQL queries can be made with data inside Excel. For example, this can be used when data in Excel (or a compatible file) is available and for this data, sql queries are needed to edit data inside a database.
This video shows how you can enable the presenter mode end the effect of this.
This mode is useful when you have at least two screens, for example, your laptop and a projector.