Command Prompt
Command Prompt and PowerShell help: fixes when they won't open or keep popping up, plus how to find your IP address and use common commands.
Browse guides →Pick the topic that matches what you need.
Command Prompt and PowerShell help: fixes when they won't open or keep popping up, plus how to find your IP address and use common commands.
Browse guides →How to use Windows Disk Cleanup safely, free up space, and fix it when it gets stuck, goes missing or won't show previous Windows installations.
Browse guides →Fixes for BIOS and UEFI boot problems, noisy or stuck PC fans, and Device Manager errors with missing audio, Bluetooth and other hardware.
Browse guides →Windows 10 fixes for backup failures, install loops, missing drivers, Windows Defender and Start menu problems, with step-by-step solutions.
Browse guides →Windows 11 fixes for the Start menu, File Explorer, Control Panel, Task Manager and Windows Hello problems, with clear step-by-step solutions.
Browse guides →Safe Registry Editor guides: how to delete entries, reset defaults, disable features and fix Regedit settings that keep reverting on Windows.
Browse guides →Check UEFI mode first, then repair the EFI boot files with bcdboot if the EFI System Partition is present. If not, use Windows 10 installation media.
If your computer keeps turning off, check whether it is sleeping, crashing, overheating, or losing power. This guide shows the fastest checks for each symptom.
Use the built-in troubleshooter first; if it fails, run the short Windows Update reset commands for Windows 10 and 11, then move to the next repair step.
Delete old Windows backups only when they are separate older sets or expired File History or system image copies. Keep active backup chains intact to avoid broken restores.
Fix 100% CPU on Windows 11 by checking the symptom pattern first, then stopping the process, trimming startup apps, updating drivers, and changing idle-state settings.
A PC fan that suddenly gets loud usually points to dust buildup, a load spike, BIOS or software fan-curve changes, or a failing bearing.
Guides start from the questions readers actually ask and are checked against official documentation and manufacturer sources.
Read our editorial policy →