Your client's workstation is experiencing frequent and unexplained reboots. After verifying there is no overheating and ensuring all hardware components are properly seated, which of the following Windows tools should you use first to further troubleshoot the system instability?
Use the Reliability Monitor to review system stability history.
Run the Disk Defragmenter to optimize file placement on hard drives.
Set up counters in Performance Monitor to track system performance.
Perform a System Restore to revert the computer to an earlier state.