What do you do first if you get a boot message of Invalid System Disk?
A) Check power and disk cabling.
B) Use the bootrec /FIXMBR command.
C) Use the bootrec /FIXBOOT command.
D) Check optical drives for discs.

Question

Quizplus · Accepted Answer

The "Invalid System Disk" error often occurs when the system tries to boot from a non-bootable disk in an optical drive. Checking for discs in optical drives is a simple first step to resolve this issue.

What Do You Do First If You Get a Boot