Signs that a computer may require servicing include slower-than-usual performance, frequent crashes or freezing, unresponsive applications, overheating, loud fan noises, or unexplained pop-ups. Users might also notice longer boot times, peripherals disconnecting unexpectedly, or error messages appearing regularly. While some issues can be resolved through software updates or simple troubleshooting, others may point to failing hardware or malware infections. Ignoring early warning signs can lead to larger problems like data loss or total system failure. Timely diagnostics from an IT professional can identify root causes and prevent costly downtime.