The System File Checker (SFC) is your first line of defense against corrupted or missing operating system files. The sfc /scannow command scans all protected system files and replaces incorrect versions with the correct Microsoft versions. It's particularly effective when your computer has been infected with malware or has suffered unexpected shutdowns that may have damaged critical system components. To run SFC, you need to open Command Prompt as an administrator (type cmd in the Start menu, right-click on Command Prompt, and select "Run as administrator") and enter sfc /scannow . The process can take 10 to 30 minutes, after which Windows will display one of four possible results: no integrity violations, successful repairs, partial repairs requiring further action, or an inability to perform the operation.

Windows 11 is a robust operating system, but system crashes, freeze-ups, and hardware bottlenecks can still happen. When your PC starts acting up, you do not need to guess what is wrong. Windows 11 includes a powerful suite of built-in diagnostic tools designed to pinpoint and resolve system errors.

If your GPU is idling above 60°C or gaming above 85°C, thermal errors are highly likely. While Task Manager does not show CPU temps natively, sudden spikes in CPU utilization (100% load) while hot indicate that background errors or runaway processes are cooking your machine. 2. Review Crash Logs Using Event Viewer

Ensure the PC is on a hard, flat surface (avoid placing laptops on beds or blankets).

Navigate to Windows Logs > System (for hardware/driver issues) or Application (for software crashes).