Fix it, step by step

Pick what needs fixing. Every guide goes from the easiest step to the most thorough one, in plain words, and nothing needs installing.

PC FixWindows 11 and 10 problems: error messages, blue screens, slow PC, no internet, no sound.
Blue screen (BSOD): how to read the stop code and fix it CRITICAL_PROCESS_DIED: causes and fixes MEMORY_MANAGEMENT blue screen: how to test and fix Computer will not turn on, or turns on with a black screen Slow computer: how to speed up Windows Disk usage at 100% in Task Manager
Phone FixAndroid and iPhone problems: battery, storage, apps, Wi-Fi, hotspot, locked phone.
Phone slow or hanging: how to speed it up Phone storage full: how to free up space Phone battery draining fast Phone overheating: why it happens and what to do Phone not charging or charging slowly Phone will not turn on, or is stuck on the logo
Car OBD CodesWhat a car fault code means, how serious it is and what to check first.
Mass air flow (MAF) sensor Manifold pressure (MAP) and barometric sensor Intake air temperature sensor Engine coolant temperature sensor Thermostat and engine warm-up Throttle position sensor
Online PrivacyScams, fake calls, data leaks, account security and what to do after a fraud.
"Digital arrest" scam: the fake police video call Fake customer care numbers in search results OTP scams: why nobody should ever hear your OTP Screen-sharing and remote access app scams Part-time job and "task" scams Fake trading apps and investment group scams
IP and InternetFind your IP address, check a link, internet speed, DNS and other network questions.
What is an IP address?IPv4 and IPv6: what is the difference?Public and private IP addresses Static and dynamic IP addresses What can someone do with my IP address?How to find your IP address on Windows