To debug PC stability issues, start with Windows Event Viewer to find hardware errors, run MemTest86 for RAM, run OCCT or Prime95 for CPU, run 3DMark stress test for GPU, and check HWiNFO sensor logs for thermal throttling. Most random crashes come from RAM instability, failing PSUs, or outdated BIOS.
📋 Step 1: Event Viewer
Windows key + R > eventvwr.msc. Navigate to Windows Logs > System. Look for red "Error" entries around crash times. Kernel-Power errors mean PSU / power. Kernel-General errors mean memory or CPU. WHEA-Logger means hardware-level machine check. These point exactly where to look next.
🧪 Step 2: RAM test
Download MemTest86, boot from USB, run 4+ passes (3-4 hours). Any error means failing RAM sticks. Test one stick at a time to identify the bad module. Also try disabling EXPO and running at JEDEC speed - unstable EXPO profiles mimic true RAM failure.
🔥 Step 3: CPU and GPU stress
Run Cinebench R23 for 30 minutes and watch CPU temps. Anything above 95°C sustained is a cooler problem. Run 3DMark Stress Test on GPU - should pass 98% or better. Below that points to GPU instability. Our cooler upgrades can fix thermal causes of crashes.
Check PSU age. PSUs over 5 years old frequently sag under load, causing random crashes that look like Windows bugs. A quality 80+ Gold PSU swap in a flaky system often fixes issues that driver reinstalls could not. Modern ATX 3.1 PSUs handle GPU transient spikes better too.{{/TipBox}}
💾 Step 4: BIOS and drivers
Update motherboard BIOS via vendor tool. Update chipset drivers from AMD or Intel (not Windows Update). Update GPU drivers via DDU + fresh install. Update NVMe firmware via Samsung Magician / WD Dashboard / Crucial Storage Executive. This sequence fixes 40% of "random crash" reports on otherwise healthy hardware.
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