Software Troubleshooting

Correct Answer: System File Checker (sfc)

The correct tool to use when attempting to fix corrupted system files in Windows is the System File Checker (sfc). The sfc utility scans and verifies the integrity of all protected system files and replaces corrupt files with a cached copy located in a compressed folder. Check Disk (chkdsk) is used to check the file system and fix logical file system errors, but not specifically for corrupted system files. Disk Cleanup removes unnecessary files from the hard drive, but does not repair corrupted system files. Windows Memory Diagnostic tool scans the RAM for errors, but does not deal with corrupted system files on the hard drive.

Correct Answer: Use Windows Recovery Environment to repair the file system and restore damaged files

Using the Windows Recovery Environment is the best approach to recover important system files that were accidentally deleted, resulting in a non-bootable Windows 8.1 PC. The Windows Recovery Environment provides tools to repair the file system and restore damaged or missing system files. Deleting the remaining files would not solve the issue and could make data recovery more difficult. Reinstalling the operating system would resolve the boot issue but would not recover the deleted files. Third-party recovery software could be used to attempt to recover the deleted files, but using the built-in Windows Recovery Environment is the most straightforward approach to repair the file system and recover the essential files to make the system bootable again.

Correct Answer: System Image Recovery

System Image Recovery is the best option to restore a Windows 7 professional computer to a system image created two weeks ago. This recovery option allows restoring the entire system state, including installed programs, system settings, and files, to a previously captured point in time. Last Known Good Configuration loads the most recent settings that worked correctly, which may not correspond to the state from two weeks ago. System Restore reverts the system to a previous restore point, but it only affects system files and settings, not user files or programs. Startup Repair is used to fix certain system problems that might prevent Windows from starting correctly, but it does not revert the system to a previous state.