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Master Windows Tools.
Diagnose & Fix Your PC Like a Pro.

Over 90% of Windows issues—from random Blue Screens (BSOD) and 100% CPU bottlenecks to corrupted system files—can be resolved using tools already built into your PC. Learn how to unleash Task Manager, Event Viewer, SFC/DISM, and PowerShell.

Popular Diagnostics: ⚡ High CPU Fix 💥 BSOD Crash Analysis 🛡️ SFC & DISM Repair 🧠 RAM Memory Test 💾 100% Disk Usage

⚡ Interactive Diagnostic Wizard

Select the primary symptom your Windows PC is experiencing to immediately identify the native tool and exact diagnostic command needed:

Crash Analysis

Fix Windows Blue Screen (BSOD) Crashes

eventvwr.msc

Recommended Tool: Windows Event Viewer & Reliability Monitor. Blue screens occur due to corrupt drivers, hardware voltage dips, or critical system file corruption. Inspect Event Viewer under Windows Logs > System for Event ID 41 (Kernel-Power) or check Reliability Monitor for exact faulting module details.

Read Step-by-Step Diagnostic Guide Run shortcut: Press Win + R & enter eventvwr.msc
Native Windows Utilities

The Essential Windows Diagnostic Arsenal

You don't need risky third-party cleaners. Every modern Windows 10 & 11 installation includes these enterprise-grade diagnostic tools.

View All 12 Windows Tools
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taskmgr

Task Manager

Real-time resource telemetry for CPU, Memory, Disk, GPU, and Network. Spot runaway background processes, memory leaks, and tune startup delay.

  • Shortcut: Ctrl + Shift + Esc
  • Best for: High CPU, stuck apps, memory leaks
Explore Diagnostic Guide →
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eventvwr.msc

Event Viewer

The central flight recorder for Windows. Logs kernel crashes, system warnings, driver failure codes (BugcheckCode), and application crash dumps.

  • Shortcut: Win + X > Event Viewer
  • Best for: BSOD troubleshooting, Event ID 41
Explore Diagnostic Guide →
🛡️
sfc /scannow

SFC & DISM

Dual command-line utilities to scan and repair corrupted Windows system files, manifest hashes, and the Windows Component Store image.

  • Shortcut: Run CMD as Administrator
  • Best for: Broken Start Menu, DLL missing errors
Explore Diagnostic Guide →
🔬
resmon.exe

Resource Monitor

Under-the-hood deep dive tool. Uncover which process is locking a file ("File is in use"), see individual disk response times, and network sockets.

  • Shortcut: Win + R > resmon
  • Best for: Locked files, 100% disk queue length
Explore Diagnostic Guide →
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mdsched.exe

Windows Memory Diagnostic

Pre-boot memory stress test that verifies the integrity of physical RAM sticks. Detects faulty cells before they corrupt your operating system.

  • Shortcut: Win + R > mdsched
  • Best for: MEMORY_MANAGEMENT BSOD, sudden reboot
Explore Diagnostic Guide →
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perfmon /rel

Reliability Monitor

Windows' best-kept secret. Plots a 1-to-10 stability timeline index showing the exact day, hour, and software update that triggered crashes.

  • Shortcut: Win + R > perfmon /rel
  • Best for: Visual crash history, driver regressions
Explore Diagnostic Guide →
In-Depth Diagnostic Tutorials

Tested Step-by-Step Problem Solving

Clear, actionable guides written by Windows diagnostics specialists. Copy real commands, read crash logs, and fix PC problems fast.

Browse All 10 Guides
Community Diagnostics Helpdesk

Facing a Stubborn Windows PC Error?

Submit your error codes, crash logs, or symptom description through our diagnostic portal. You can review all logged tickets and track technical resolutions directly in our built-in helpdesk inquiry viewer.