IT knowledge base
Fixes for everyday IT problems, step by step
From a slow PC and an offline printer to a hacked account and a WordPress error. Clear, tested guides for home users and businesses.
228 fixes · 19 categories
Categories
WindowsSlow computer, Windows Update, blue screen, accounts and settings
- Windows computer running slow: how to speed up the system
- Windows Update not working: fixes for installation errors
- Blue Screen (BSOD): How to Find the Cause and Fix It
- Cannot sign in to Windows: account solutions
macOS and MacSlow Mac, updates, disk space, WiFi and apps
- Slow Mac: how to speed up your computer in a few steps
- macOS update stuck halfway: what to do when it freezes
- Mac disk is full: how to free up space without losing files
- Spinning wheel: fix for a Mac that freezes and hangs
Android phonesBattery, storage, apps that close, slowness and a locked phone
- Battery drains fast: how to extend battery life on Android
- Phone not charging: what to check before taking it to a repair shop
- Phone storage full: how to free up space without losing data
- Apps Crashing on Android: How to Get Them Working Again
iPhone and iPadiCloud storage, battery, updates, Apple ID and data transfer
- iCloud storage is full: how to free up space and resume backup
- Battery draining fast: how to check iPhone battery health
- iOS update stuck: how to finish it without losing data
- Apple ID (now Apple Account) is locked: how to regain access to your account and data
Printers and scannersPrinter not printing, offline, paper jam, scanning and drivers
- Printer is offline: how to get it working again in a few minutes
- Print Queue Stuck: How to Clear It and Start Over
- Paper jammed in printer: how to safely remove it
- Faded printer print: how to improve print quality
Internet, WiFi and networkSlow internet, WiFi drops, router, DNS and office network
- Internet is slow: how to speed up your connection and test speed
- WiFi keeps dropping: how to stop disconnects
- Connected to WiFi but no internet: what to check
- DNS error: server cannot find the address, how to fix it
Email and OutlookOutlook not sending, inbox full, spam, account setup and signature
- Outlook not sending or receiving messages: how to fix the problem
- Outlook keeps asking for password: solution for repeated sign-ins
- Mailbox is full: how to free up space in your mailbox
- PST and OST file errors: how to repair corrupted data
Microsoft 365, Office and TeamsWord, Excel, Teams, OneDrive, licensing and activation
- Office says product is not licensed: how to activate it
- Excel is slow and freezing: how to speed up large spreadsheets
- Word file is corrupted or not saved: how to recover it
- OneDrive not syncing files: how to fix the stall
WordPressWhite screen, errors, slow site, hacked site and updates
- WordPress White Screen: How to Get Your Site Back Online
- Critical Error on WordPress Site: Cause and Solution
- Database connection error: what to check in WordPress
- Site redirects to another domain: malware removal
Website, domain and hostingDNS, SSL certificate, site not working, email on domain and speed
- Website not loading: what to check first and how to get it back online
- DNS changes not visible: how long propagation takes and how to speed it up
- SSL error and "connection is not secure" message: how to fix it
- Expired domain: how to recover it and prevent site loss
Security and virusesHacked account, phishing, virus, ransomware and two-factor protection
- Hacked email account: how to restore access and stop abuse
- Clicked on a phishing email: what to do immediately
- Virus or malware on your computer: how to remove it without losing data
- Ransomware: first steps when files are encrypted
Backup and Data RecoveryDeleted files, damaged disk, backup strategy and data transfer
- Accidentally deleted files: how to recover them on Windows
- External drive not showing up: how to get it working again
- Corrupted SD card or USB: how to rescue photos and files
- 3-2-1 backup rule: how to protect your data without complications
Buying Computers and EquipmentWhich laptop, how much RAM, SSD, monitor, router and office equipment
- Which laptop to buy for office and students in 2026
- Laptop for programmers: which configuration is enough
- How much RAM do you need: 8, 16 or 32 GB
- SSD or HDD: what is worth buying today
Hardware and ComponentsOverheating, noise, disk, RAM, monitor, battery and upgrades
- Laptop overheating and noisy fan: how to cool it down
- PC Won't Turn On: Check Power Supply and Power Button
- No display on monitor, black screen: what to check first
- Check Disk Health with SMART Data: A Guide
Programming and debuggingGit, npm, Docker, CORS, Python and the most common developer errors
- Git merge conflict: how to resolve it quickly and continue working
- How to undo a git commit and restore the previous state
- npm ERR! dependency conflict: how to resolve and install packages
- Node.js version not compatible: how to change it and fix the error
Servers and LinuxDisk full, SSH, permissions, services, Windows Server and RDP
- Full disk on Linux server: how to free up space
- SSH connection refused: how to restore server access
- SSH permission denied publickey: how to fix server login
- Linux file permissions: chmod and chown without errors
Browsers and Google AccountChrome, Edge, cache, extensions, passwords and Google Account
- Chrome is slow: how to speed up the browser in five minutes
- Chrome crashing or freezing: what to check first
- How to properly clear cache and cookies without losing data
- Pop-up ads in browser: removing malicious extensions
Video calls and equipmentCamera, microphone, echo, Zoom, Teams and Google Meet
- Camera not showing in video call: how to get it working again
- Microphone not working in Zoom, Teams or Meet: step-by-step checks
- Others can't hear you in a meeting: what to check first
- Echo and feedback in video calls: how to fix them
AI toolsChatGPT, Copilot and AI tools: errors, privacy and tips for work
- ChatGPT reports an error or limit: how to continue working
- AI gives wrong answers: how to recognize hallucinations
- What not to paste into AI tools: privacy rules for businesses
- Copilot not showing in Microsoft 365: how to get it back
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