A computer with the Windows 7 operating system fails to boot when the system is powered on. The technician suspects that the operating system has been attacked by a virus that rendered the system inoperable. What measure could be taken to restore system functionality?
- Use a differential backup to restore the system.
- Use an incremental backup to restore the system.
- Use a system image that was created prior to the failure to restore the system.
- Run chkdsk on the affected drive to restore system files to their post-installation state.
The best way to restore an operating system that has been corrupted by a virus is to use a prior system image to conduct the restore. CHKDSK is a Disk Error-Checking tool in Windows 7. It is useful in troubleshooting errors caused by corruption of the physical disk surface and can also be used to check the integrity of various files and folders within the operating system. In order to use differential and incremental backups to restore the system you would also require the last full backup as well.