CompTIA A+ 220-902 Question I-42

A technician gets a call from a customer stating that their computer will not boot. They are getting the following error “invalid system disk”. Which of the following should the technician check FIRST?

A. Verify the operating system is installed correctly.
B. Verify that all removable drives are empty.
C. Verify Boot.ini is on the hard drive.
D. Verify the computer will boot into safe mode.

Correct Answer: B

Explanation:
http://support.microsoft.com/kb/128730