For laptop users complaining about short battery life or random shutdowns, you can generate a hidden health report directly from Windows.
Battery Report: In the Administrator Command Prompt, type:
powercfg /batteryreport
This saves an HTML file to your system folder. Open it to see the "Design Capacity" vs. "Full Charge Capacity." If the gap is large, the battery needs replacement.
System File Checker (SFC): If Windows feels "glitchy" or icons are missing, type:
sfc /scannow
This scans all protected system files and replaces corrupted ones with a cached copy.