Use compressed air to clean out dust from the fans.

Pay attention to a sequence of beeps or flashing lights on the motherboard; these are error codes telling you what's wrong. Phase 2: Computer is On, But Slow/Broken (Windows) If the computer turns on but runs slow or freezes:

(e.g., black screen, blue screen, loud fan, frozen) Are you seeing any error codes or hearing beeps? Is this a laptop or desktop?

Use Windows Security to perform a full system scan for malware. Phase 3: Overheating & Loud Fans

Open Task Manager (Ctrl + Shift + Esc), go to the "Startup" tab, and disable apps you don't need immediately.

Make sure you have at least 10-20 GB free on your C: drive. Delete large files or empty the Recycle Bin.

If your computer is acting up, don't panic! Most issues can be resolved with some simple troubleshooting. Phase 1: The "No POST" / Won't Turn On Panic

Unplug USB drives, printers, external hard drives, and cameras. A faulty USB device can prevent booting.