Windows 11 troubleshooting encompasses a comprehensive set of diagnostic tools, recovery options, and optimization techniques designed to resolve system errors, performance issues, and configuration problems. From boot failures and blue screen errors to update problems and network connectivity issues, Windows 11 provides both automated troubleshooters and manual command-line utilities to diagnose and repair various system malfunctions. Understanding the relationship between diagnostic tools (Event Viewer, Reliability Monitor), system repair utilities (SFC, DISM, CHKDSK), and recovery options (Safe Mode, System Restore, Reset) is essential—prevention through maintenance (regular updates, disk cleanup, driver management) is significantly more effective than reactive troubleshooting, and mastering both GUI-based tools and PowerShell/CMD commands provides maximum flexibility when resolving critical issues that may prevent normal system operation.