Windows Troubleshooting Checklist
A practical Windows troubleshooting checklist that starts with safe checks, separates software from hardware clues, and sends you to the right detailed guide.
Windows, hardware, browsers, and networks
Fix your computer problems, step by step
Practical PC publishes troubleshooting guides for ordinary Windows users. Each article helps you identify the problem, understand likely causes, try safe fixes, and know when hardware or a professional is the honest next step.
Popular troubleshooting topics
Home Wi-Fi Troubleshooting Flowchart
A text-first Wi-Fi diagnostic flowchart for deciding whether the problem is the PC, router, ISP, DNS, VPN, proxy, or wireless signal.
Windows File Extension Reference
Plain-language Windows file extension reference for common document, installer, script, archive, image, media, and system file types.
How to Fix Wi-Fi Connected but No Internet
When Windows says you are on Wi-Fi but websites will not load, use this checklist to tell whether the problem is the PC, the router, or your internet service.
How to Fix Windows 11 When It Is Running Slow
Find out why a Windows 11 PC feels slow and follow safe steps to free memory, reduce startup load, and check whether the drive or hardware is the real limit.
Security, Malware Troubleshooting
How to Recognize Fake Windows Security Warnings
Full-screen "your PC is infected" pages, fake Microsoft phone numbers, and lock-screens in the browser are scams, close them without calling or installing their "fixer."
Browse by category
Windows Troubleshooting
Fix everyday Windows 11 problems: slow performance, updates, startup, Settings, File Explorer, and common error messages.
PC Hardware
Troubleshoot RAM, drives, USB devices, keyboards, mice, monitors, overheating, and printers without unnecessary parts swapping.
Internet & Network
Fix Wi-Fi that says connected with no internet, slow connections, Ethernet, DNS, and router problems.
Browser Troubleshooting
Speed up Chrome, Edge, and Firefox, fix crashes, downloads, extensions, and cache problems without losing your passwords.
Software Troubleshooting
Programs that will not open or install, application crashes, Microsoft Office, PDF files, and missing DLL messages.
Files & Storage
Free up disk space, find large files, recover items from the Recycle Bin, and fix drives that do not show in File Explorer.
Security & Privacy
Windows Security, malware symptoms, account safety, browser privacy, and conservative advice that does not weaken protection.
Free PC tools
Diagnose common PC problems, check Windows errors, calculate storage and download times, and more.
Troubleshooting
PC Troubleshooting Wizard
Answer a few questions about what is going wrong. The wizard points you to the safest matching guide on this site.
Troubleshooting
BSOD Stop Code Lookup
Look up a Windows blue-screen stop code and see likely causes, safe first steps, and when hardware may be involved.
Troubleshooting
Internet Connection Troubleshooter
Answer practical questions about Wi-Fi, Ethernet, and websites. Get a likely cause and the matching Practical PC guides.
Network tools
DNS Lookup
Look up public A, AAAA, CNAME, MX, NS, and TXT records for a domain and read what each record type means.
PC hardware
PC Storage Calculator
Add up Windows, apps, games, photos, and video to estimate how large a drive you may need, with room to spare.
Security
Password Strength Checker
Check password characteristics in your browser. Nothing is sent to our server. This is guidance, not a guarantee.
Error codes and blue screens
If Windows gives you a code or stop-code name, use that clue before repeating generic fixes.
Latest guides
Browser Cache vs Cookies: What to Clear and When
Understand when to clear cached files, cookies, or site data in Chrome, Edge, and Firefox without wiping passwords unnecessarily.
Home Wi-Fi Troubleshooting Flowchart
A text-first Wi-Fi diagnostic flowchart for deciding whether the problem is the PC, router, ISP, DNS, VPN, proxy, or wireless signal.
How to Check Suspicious Browser Extensions in Windows
Find and remove suspicious Chrome or Edge extensions without disabling browser security or installing cleanup tools from ads.
Software, DLL & Runtime Errors
How to Fix a Missing DLL Error in Windows
Fix missing DLL errors by identifying the affected program, repairing the app, and installing official runtimes instead of downloading random DLL files.
Why this site is written this way
Practical first
Guides follow a fixed structure: short answer, symptoms, safe steps, then what to do if it still fails. Commands are explained, not dumped.
Honest about limits
We do not invent lab tests or certifications. When a problem may be hardware, we say so instead of stretching software tricks.
Conservative on security
No cracked software, no "optimizer" downloads, and no advice to switch off Windows Security as a default fix.
Read the about page and the editorial policy.